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  1. The birds of North and Middle America : a descriptive catalogue of the higher groups, genera, species, and subspecies of birds known to occur in North America, from the Arctic lands to the Isthmus of Panama, the West Indies and other islands of the Caribbean sea, and the Galapagos Archipelago /
    By: Ridgway, Robert, - Friedmann, Herbert,
    Publication info: Washington :Govt. Print. Off.,1901-
    Contributed by: Cornell University Library
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  2. The birds of North and middle America: a descriptive catalogue of the higher groups, genera, species, and subspecies of birds known to occur in North America, from the Arctic lands to the Isthmus of Panama, the West Indies and other islands of the Caribbean sea, and the Galapagos Archipelago.
    By: Ridgway, Robert, - Friedmann, Herbert,
    Publication info: Washington,Govt. Print. Off.,1901-
    Contributed by: Boston College Libraries (archive.org)
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  3. Birds of the world; a popular account. With a chapter on the anatomy of birds, by Frederic A. Lucas; the whole edited by Robert Ridgway.
    By: Knowlton, Frank Hall, - Lucas, Frederic A. - Ridgway, Robert,
    Publication info: New York,Holt,1909.
    Contributed by: University of California Libraries (archive.org)
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  4. Catalogue of the aquatic and fish-eating birds exhibited by the United States National Museum / by Robert Ridgway
    By: Ridgway, Robert, - United States National Museum. - Great International Fisheries Exhibition
    Publication info: Washington :G.P.O.,1883.
    Contributed by: Smithsonian Libraries
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  5. Color standards and color nomenclature,
    By: Ridgway, Robert,
    Publication info: Washington, D. C.The author,1912.
    Contributed by: Missouri Botanical Garden, Peter H. Raven Library
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  6. Correspondence : Ridgway (Robert) and Engelmann (George), 1880.
    By: Ridgway, Robert,
    Contributed by: Missouri Botanical Garden, Peter H. Raven Library
    BHL Collections: Engelmann Papers, Missouri Botanical Garden
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  7. A history of North American birds / by S. F. Baird, T. M. Brewer, and R. Ridgway.
    By: Baird, Spencer Fullerton, - Brewer, T. M. - Ridgway, Robert,
    Publication info: Boston :Little, Brown,1905.
    Contributed by: Smithsonian Libraries
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  8. A history of North American birds. Land birds.
    By: Baird, Spencer Fullerton, - Brewer, T. M. - Ridgway, Robert,
    Publication info: Boston,Little, Brown,1874.
    Contributed by: American Museum of Natural History Library
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  9. The humming birds / by Robert Ridgway.
    By: Ridgway, Robert,
    Publication info: Washington :Govt. Print. Off.,1892.
    Contributed by: Smithsonian Libraries
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  10. The humming birds. By Robert Ridgway.
    By: Ridgway, Robert,
    Contributed by: Prelinger Library (archive.org)
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  11. A manual of North American birds by Robert Ridgway.
    By: Ridgway, Robert,
    Publication info: Philadelphia :J.B. Lippincott,1887.
    Contributed by: Canadiana.org (archive.org)
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  12. A manual of North American birds.
    By: Ridgway, Robert,
    Edition: 2d ed.
    Publication info: Philadelphia,J. B. Lippincott Company,1896.
    Contributed by: Cornell University Library
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  13. A manual of North American birds.
    By: Ridgway, Robert,
    Publication info: Philadelphia,J. B. Lippincott,1887.
    Contributed by: Cornell University Library
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  14. A manual of North American birds.
    By: Ridgway, Robert,
    Publication info: Philadelphia,Lippincott,1887.
    Contributed by: Gerstein - University of Toronto (archive.org)
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  15. A manual of North American birds.
    By: Ridgway, Robert,
    Edition: 4th ed.
    Publication info: Philadelphia :J.B. Lippincott Co.,1900.
    Contributed by: University Library, University of Illinois Urbana Champaign
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  16. A manual of North American birds. By Robert Ridgway. Illustrated by 464 outline drawings of the generic characters.
    By: Ridgway, Robert,
    Edition: 2d ed.
    Publication info: Philadelphia,J. B. Lippincott company,1896.
    Contributed by: American Museum of Natural History Library
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  17. A manual of North American birds. By Robert Ridgway. Illustrated by 464 outline drawings of the generic characters.
    By: Ridgway, Robert,
    Publication info: Philadelphia,J. B. Lippincott Company,1887.
    Contributed by: American Museum of Natural History Library
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  18. A nomenclature of colors for naturalists : and compendium of useful knowledge for ornithologists /
    By: Ridgway, Robert,
    Publication info: Boston :Little, Brown, and Company,1886.
    Contributed by: Smithsonian Libraries
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  19. A nomenclature of colors for naturalists : and compendium of useful knowledge for ornithologists /
    By: Ridgway, Robert, - John Wilson and Son,
    Publication info: Boston :Little, Brown and Company,1886.
    Contributed by: Research Library, The Getty Research Institute (archive.org)
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  20. Nomenclature of North American birds chiefly contained in the United States National Museum.
    By: Ridgway, Robert,
    Publication info: Washington,Govt. Print. Off.,1881.
    Contributed by: Cornell University Library
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  21. Die Nordamerikanische Vogelwelt / von Heinrich Nehrling ... Unter künstlerischer Mitwirkung von Prof. Robert Ridgway ... Prof. A. Göring ... und Akademiemaler Gustav Mützel ...
    By: Nehrling, Henry, - Ridgway, Robert,
    Publication info: Milwaukee, Wis. :G. Brumber,1891.
    Contributed by: Smithsonian Libraries
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  22. Die Nord-Amerikanische Vogelwelt. Von Heinrich Nehrling ... Unter künstlerischer Mitwirkung von Prof. Robert Ridgway ... Prof. A. Göring ... und Akademiemaler Gustav Mützel ...
    By: Nehrling, Henry, - Ridgway, Robert,
    Publication info: Milwaukee, Wis.,G. Brumder[1889]-91.
    Contributed by: American Museum of Natural History Library
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  23. On a collection of birds made by Messrs. J. E. Benedict and W. Nye of the United States Fish commission steamer "Albatross." By Robert Ridgway.
    By: Ridgway, Robert, - Benedict, James E. - Nye, W.
    Contributed by: Smithsonian Libraries
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  24. The ornithology of Illinois / [by Robert Ridgway and S.A. Forbes].
    By: Ridgway, Robert, - Forbes, Stephen Alfred,
    Publication info: Springfield, Ill.,H.W. Rokker, printer,1889-1895.
    Contributed by: American Museum of Natural History Library
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  25. The ornithology of Illinois. Part I. Descriptive catalogue. By Robert Ridgway. Part II. Economic ornithology. By S. A. Forbes. Pub. by the authority of the state Legislature.
    By: Ridgway, Robert,
    Publication info: Springfield, Ill. :H. W. Rokker, printer,1889-95.
    Contributed by: University of California Libraries (archive.org)
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  26. The ornithology of Illinois. Part I. Descriptive catalogue. By Robert Ridgway. Part II. Economic ornithology. By S.A. Forbes. Pub. by the authority of the state Legislature.
    By: Ridgway, Robert,
    Publication info: Springfield, Ill. :H.W. Rokker, printer,1889-95.
    Contributed by: University Library, University of Illinois Urbana Champaign
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  27. The ornithology of Illinois. Part I. Descriptive catalogue. By Robert Ridgway. Part II. Economic ornithology. By S. A. Forbes. Pub. by the authority of the state Legislature.
    By: Ridgway, Robert,
    Publication info: Springfield, Ill.,H. W. Rokker, printer,1889-95.
    Contributed by: MBLWHOI Library
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  28. The ornithology of Illinois. Part I. Descriptive catalogue.
    By: Ridgway, Robert, - Illinois.
    Publication info: Springfield, Ill.,H. W. Rokker, Printer,1889-95.
    Contributed by: Cornell University Library
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  29. Outlines of a natural arrangement of the Falconidae.
    By: Ridgway, Robert,
    Publication info: Washington,Govt. Print. Off.,1875.
    Contributed by: Cornell University Library
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  30. Part I. Palæontology. By F. B. Meek. Part II. Palæontology. By James Hall and R. P. Whitfield. Part III. Ornithology. By Robert Ridgway...
    By: Meek, F. B. - Hall, James, - Ridgway, Robert, - Whitfield, Robert Parr,
    Publication info: Washington,Govt. print. off.,1877.
    Contributed by: Smithsonian Libraries
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  31. Report of the geological exploration of the fortieth parallel /
    By: United States Geological Exploration of the Fortieth Parallel - Bien, Julius, - Eaton, Daniel Cady, - Emmons, Samuel Franklin, - Hague, A. - Hague, James D. - Hall, James, - King, Clarence, - Meek, F. B. - Ridgway, Robert, - Watson, Sereno, - Whitfield, R. P.
    Publication info: Washington, D.C. :G.P.O.,1870-80
    Contributed by: University Library, University of Illinois Urbana Champaign
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  32. Report of the Geological exploration of the fortieth parallel
    By: United States Geological Exploration of the Fortieth Parallel - Bien, Julius, - Eaton, Daniel Cady, - Emmons, Samuel Franklin, - Hague, A. - Hague, James D. - Hall, James, - King, Clarence, - Meek, F. B. - Ridgway, Robert, - Watson, Sereno, - Whitfield, Robert Parr,
    Publication info: Washington :Govt. Print. Off.,1870-80
    Contributed by: Smithsonian Libraries
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  33. The water birds of North America. By S. F. Baird, T. M. Brewer and R. Ridgway. Issued in continuation of the publications of the Geological survey of California. J. D. Whitney, state geologist.
    By: Baird, Spencer Fullerton, - Brewer, T. M. - Ridgway, Robert,
    Publication info: Boston,Little, Brown, and Company,1884.
    Contributed by: Smithsonian Libraries
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  1. Another Kirtland's Warbler from Michigan
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 1
    Date: 1884
    Page Range: 389--389
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  2. Baird, Brewer, and Ridgway's Water Birds of North America
    By: Baird, S F - Brewer, T M - Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 1
    Date: 1884
    Page Range: 382--386
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  3. Belding on Birds of Lower California
    By: Ridgway, Robert, 1850-1929 - Belding, L
    Type: Article
    In: The Auk
    Volume: 1
    Date: 1884
    Page Range: 83--84
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  4. Belding on Birds of Lower California
    By: Ridgway, Robert, 1850-1929 - Belding, L
    Type: Article
    In: The Auk
    Volume: 1
    Date: 1884
    Page Range: 83--84
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  5. The birds of North and middle America …
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Bulletin of the United States National Museum
    Date: 1907
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  6. Birds of the Galapagos Archipelago
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 19
    Issue: 1116
    Date: 1897
    Page Range: 459--670
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  7. Buteo brachyurus and B. fuliginosus
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 7
    Date: 1890
    Page Range: 90--91
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  8. Catalogue of a collection of birds made by Mr. Chas. H. Townsend, on islands in the Caribbean Sea and in Honduras
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 10
    Issue: 665
    Date: 1888
    Page Range: 572--597
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  9. Catalogue of a collection of birds made in the interior of Costa Rica by Mr. C.C. Nutting
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of the United States National Museum
    Volume: v. 5, p. 493-502
    Date: 1882
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  10. A catalogue of the birds of North America
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 3
    Issue: 138
    Date: 1880
    Page Range: 163--246
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  11. Characters of a new American family of passerine birds
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 18
    Issue: 1076
    Date: 1896
    Page Range: 449--450
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  12. Colinus virginianus cubanensis Not a Florida Bird
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 11
    Date: 1894
    Page Range: 324--325
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  13. Concerning Three alleged "Erroneous Georgia Records"
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 27
    Date: 1910
    Page Range: 88--88
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  14. Correct Nomenclature of the Texas Cardinal
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 14
    Date: 1897
    Page Range: 95--95
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  15. Description of a melanistic specimen of Buteo latissimus (Wils.)
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 9
    Issue: 567
    Date: 1886
    Page Range: 248--249
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  16. Description of a new American kingfisher
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The Biological Society of Washington
    Volume: 2
    Page Range: 95--96
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  17. Description of a New Cardinal Grosbeak from Arizona
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 2
    Date: 1885
    Page Range: 343--345
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  18. Description of a new fly-catcher and a supposed new petrel from the Sandwich Islands
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 4
    Issue: 236
    Date: 1882
    Page Range: 337--338
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  19. Description of a New Genus of Tyrannidæ from Santo Domingo
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 3
    Date: 1886
    Page Range: 382--383
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  20. Description of a new Geothlypis from Brownsville, Texas
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 16
    Issue: 964
    Date: 1894
    Page Range: 691--692
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  21. Description of a new plumed partridge from Sonora
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 10
    Issue: 617
    Date: 1887
    Page Range: 148--150
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  22. Description of a new race of the red-shouldered hawk from Florida
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 7
    Issue: 457
    Date: 1885
    Page Range: 514--515
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  23. Description of a new sharp-tailed sparrow from California
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 14
    Issue: 872
    Date: 1891
    Page Range: 483--484
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  24. Description of a new snow bunting from Alaska
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 7
    Issue: 412
    Date: 1884
    Page Range: 68--70
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  25. Description of a new species of boat-billed heron from Central America
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of the United States National Museum
    Volume: v. 8, p. 93-94
    Date: 1885
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  26. Description of a new species of Cotinga from the Pacific coast of Costa Rica
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 10
    Issue: 599
    Date: 1887
    Page Range: 1--2
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  27. Description of a New Species of Elf Owl from Socorro Island, Western Mexico
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 3
    Date: 1886
    Page Range: 333--334
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  28. Description of a new species of ground warbler from eastern Mexico
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 18
    Issue: 1045
    Date: 1896
    Page Range: 119--120
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  29. Description of a New Species of Hummingbird from Arizona
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 15
    Date: 1898
    Page Range: 325--326
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  30. Description of a new species of whippoorwill from Costa Rica
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 14
    Issue: 867
    Date: 1891
    Page Range: 465--466
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  31. Description of a new species of whippoorwill from Costa Rica
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of the United States National Museum
    Volume: v. 14, p. 465-466
    Date: 1891
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  32. Description of a new storm petrel from the coast of western Mexico
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 16
    Issue: 962
    Date: 1893
    Page Range: 687--688
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  33. Description of a New Tityra from West ern Mexico
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 5
    Date: 1888
    Page Range: 263--263
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  34. Description of a recently new oyster-catcher (Haematopus galapagensis) from the Galapagos Islands
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 9
    Issue: 573
    Date: 1887
    Page Range: 325--326
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  35. Description of a supposed new species of Odontophorus from southern Mexico
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 16
    Issue: 945
    Date: 1893
    Page Range: 469--470
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  36. Description of an adult female Euphonia supposed to be Euphonia gnatho (Cabanis)
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The Biological Society of Washington
    Volume: 18
    Date: 1905
    Page Range: 225--226
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  37. Description of Four New Species of Birds from the Bahama Islands
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 3
    Date: 1886
    Page Range: 334--337
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  38. Description of some new species of birds from Cozumel Island, Yucatan
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The Biological Society of Washington
    Volume: 3
    Page Range: 21--24
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  39. Description of two new birds from Costa Rica
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of the United States National Museum
    Volume: v. 8, p. 23-24
    Date: 1885
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  40. Description of two new species of birds from Costa Rica, and notes on other rare species from that country
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 1
    Issue: 39
    Date: 1878
    Page Range: 252--255
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  41. Description of two new species of Kaup's genus Megascops
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 10
    Date: 1887
    Page Range: 267--268
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  42. Description of two supposed new species of swifts
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 16
    Issue: 923
    Date: 1893
    Page Range: 43--44
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  43. Description of two supposed new species of swifts
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of the United States National Museum
    Volume: v. 16, p. 43-44
    Date: 1893
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  44. Descriptions of new genera species and subspecies of American birds
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The Biological Society of Washington
    Volume: 16
    Date: 1903
    Page Range: 105--111
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  45. Descriptions of new species and genera of birds from the lower Amazon
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 10
    Issue: 660
    Date: 1888
    Page Range: 516--528
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  46. Descriptions of some new birds collected on the islands of Aldabra and Assumption, northwest of Madagascar, by Dr. W. L. Abbott
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 16
    Issue: 953
    Date: 1893
    Page Range: 597--600
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  47. Descriptions of some new forms of American cuckoos, parrots, and pigeons
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The Biological Society of Washington
    Volume: 28
    Date: 1915
    Page Range: 105--107
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  48. Descriptions of some new forms of oligomyodian birds
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The Biological Society of Washington
    Volume: 19
    Date: 1906
    Page Range: 115--120
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  49. Descriptions of some new genera of Tyrannidae, Pipridae, and Cotingidae
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The Biological Society of Washington
    Volume: 18
    Date: 1905
    Page Range: 207--210
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  50. Descriptions of some new North American birds
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The Biological Society of Washington
    Volume: 2
    Page Range: 89--95
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  51. Descriptions of some new species and subspecies of birds from Middle America
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 10
    Issue: 655
    Date: 1888
    Page Range: 505--510
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  52. Descriptions of some new species and subspecies of birds from tropical America
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The Biological Society of Washington
    Volume: 25
    Date: 1912
    Page Range: 87--92
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  53. Descriptions of some new species of birds, supposed to be from the interior of Venezuela
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 9
    Issue: 555
    Date: 1886
    Page Range: 92--94
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  54. Descriptions of Supposed New Genera, Species, and Subspecies of American Birds. I. Fringillidæ
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 15
    Date: 1898
    Page Range: 223--230
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  55. Descriptions of Three New Birds of the Families Mniotiltidæ and Corvidæ
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 19
    Date: 1902
    Page Range: 69--70
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  56. Descriptions of two new species of birds from Costa Rica, and notes on other rare species from that country
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of the United States National Museum
    Volume: v. 1, p. 252-255
    Date: 1878
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  57. Diagnoses of new forms of Micropodidae and Trochilidae
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The Biological Society of Washington
    Volume: 23
    Date: 1910
    Page Range: 53--55
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  58. Diagnoses of nine new forms of American birds
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The Biological Society of Washington
    Volume: 16
    Date: 1903
    Page Range: 167--169
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  59. Diagnoses of some new forms of neotropical birds
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The Biological Society of Washington
    Volume: 21
    Date: 1908
    Page Range: 191--195
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  60. Diagnoses of some new forms of Picidae
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The Biological Society of Washington
    Volume: 24
    Date: 1911
    Page Range: 31--35
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  61. Diagnoses of some new genera of American birds
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The Biological Society of Washington
    Volume: 25
    Date: 1912
    Page Range: 97--101
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  62. Discovery of the Breeding Place of McKay's Snowflake (Plectrophenax hyperboreus)
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 3
    Date: 1886
    Page Range: 276--277
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  63. Dr. Abbott's Collections from the Seychelles and Other Islands
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 13
    Date: 1896
    Page Range: 331--332
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  64. An Earlier Name for Ammodramus leconteii
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 14
    Date: 1897
    Page Range: 320--320
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  65. Eighth Supplement to the American Ornithologists' Union Check-List of North American Birds
    By: Brewster, William - Allen, J A - Coues , Elliott - Merriam, C Hart - Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 14
    Date: 1897
    Page Range: 117--135
    View Article
  66. Fifth Supplement to the American Ornithologists' Union Check-List of North American Birds
    By: Coues , Elliott - Allen, J A - Brewster, William - Chapman, Frank M - Cory, Charles B - Henshaw, H W - Merriam, C Hart - Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 10
    Date: 1893
    Page Range: 59--63
    View Article
  67. Fourth Supplement to the American Ornithologists' Union Check-List of North American Birds
    By: Allen, J A - Brewster, William - Chapman, Frank M - Cory, Charles B - Coues , Elliott - Henshaw, H W - Merriam, C Hart - Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 9
    Date: 1892
    Page Range: 105--108
    View Article
  68. Further notes on the genus Xiphocolaptes of Lesson
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 13
    Issue: 796
    Date: 1890
    Page Range: 47--48
    View Article
  69. Geographical, versus Sexual, Variation in Oreortyx pictus
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 11
    Date: 1894
    Page Range: 193--196
    View Article
  70. Harlan's Hawk a Race of the Red-Tail, and Not a Distinct Species
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 7
    Date: 1890
    Page Range: 205--206
    View Article
  71. Helminthophila Leucobronchialis
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 2
    Date: 1885
    Page Range: 359--363
    View Article
  72. Hemithraupis: A Correction
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 15
    Date: 1898
    Page Range: 330--331
    View Article
  73. Hybridism and Generic Characters in the Trochilidæ
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 26
    Date: 1909
    Page Range: 440--442
    View Article
  74. In memoriam: José Cástulo Zeledón Born March 24, 1846-Died July 16, 1923
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: v. 60, p. 682-689
    Date: 1923
    View Article (External)
  75. List of Birds Collected on the Bahama Islands by the Naturalists of the Fish Commission Steamer Albatross
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 8
    Date: 1891
    Page Range: 333--339
    View Article
  76. List of species of Middle and South American birds not contained in the United States National Museum
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 4
    Issue: 215
    Date: 1881
    Page Range: 165--203
    View Article
  77. Lophophanes vs. Bæolophus
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 20
    Date: 1903
    Page Range: 308--308
    View Article
  78. Mareca Americana
    By: Cooper , J G - Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 3
    Date: 1886
    Page Range: 401--404
    View Article
  79. New Edition of Ridgway's 'Nomenclature of Colors'
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 26
    Date: 1909
    Page Range: 450--450
    View Article
  80. New genera of Tyrannidae and Turdidae, and new forms of Tanagridae and Turdidae
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The Biological Society of Washington
    Volume: 18
    Date: 1905
    Page Range: 211--213
    View Article
  81. New genera, species and subspecies of Formicariidae, Fumariidae, and Dendrocolaptidae
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The Biological Society of Washington
    Volume: 22
    Date: 1909
    Page Range: 69--74
    View Article
  82. A New Name Necessary for Selasphorus floresii Gould
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 8
    Date: 1891
    Page Range: 114--114
    View Article
  83. A New Petrel for North America
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 2
    Date: 1885
    Page Range: 386--387
    View Article
  84. New Species, Etc., of American Birds. IV. Fringillidæ (Concluded); Corvidæ (Part)
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 16
    Date: 1899
    Page Range: 254--256
    View Article
  85. New Species, Etc., of American Birds. V. Corvidæ (Concluded)
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 17
    Date: 1900
    Page Range: 27--29
    View Article
  86. New Species, Etc., of American Birds: III. Fringillidæ (Continued)
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 16
    Date: 1899
    Page Range: 35--37
    View Article
  87. New Species, Etc., of American Birds: VI. Fringillidæ (Supplement)
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 17
    Date: 1900
    Page Range: 29--30
    View Article
  88. Note on Astur atricapillus striatulus
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 1
    Date: 1884
    Page Range: 252--253
    View Article
  89. Note on Junco Annectens Baird and J. ridgwayi Mearns
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 14
    Date: 1897
    Page Range: 94--94
    View Article
  90. Note on Pachyrhamphus alhinucha, Burmeister
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 14
    Issue: 870
    Date: 1891
    Page Range: 479--480
    View Article
  91. Note on Rougetius aldabranus
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 11
    Date: 1894
    Page Range: 74--74
    View Article
  92. Note on Sarcorhamphus æquatorialis Sharpe
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 2
    Date: 1885
    Page Range: 169--171
    View Article
  93. Note on Selasphorus torridus Salvin
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of the United States National Museum
    Volume: v. 7, p. 14
    Date: 1884
    View Article (External)
  94. Note on Spizella Monticola Ochracea Brewst
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 4
    Date: 1887
    Page Range: 258--259
    View Article
  95. Note on the Alleged Occurrence of Trochilus heloisa (Less. & De Latt.) within North American Limits
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 8
    Date: 1891
    Page Range: 115--115
    View Article
  96. Note on the Anas hyperboreus, Pall. and Anser albatus, Cass
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The Biological Society of Washington
    Volume: 2
    Page Range: 107--108
    View Article
  97. Note regarding the earliest name for Carpodacus haemorrhous (Wagler)
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The Biological Society of Washington
    Volume: 2
    Page Range: 110--111
    View Article
  98. Notes on Ardea wuerdemanni Baird
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 10
    Issue: 612
    Date: 1887
    Page Range: 112--115
    View Article
  99. Notes on Costa Rican birds, with descriptions of seven new species and subspecies and one new genus
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 11
    Issue: 750
    Date: 1889
    Page Range: 537--546
    View Article
  100. Notes on Costa Rican birds, with descriptions of seven new species and subspecies and one new genus
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of the United States National Museum
    Volume: v. 11, p. 537-546
    Date: 1888
    View Article (External)
  101. Notes on some birds from the interior of Honduras
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 14
    Issue: 868
    Date: 1891
    Page Range: 467--471
    View Article
  102. Notes on some Costa Rica Birds
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of the United States National Museum
    Volume: 4
    Date: 1882
    Page Range: 333--337
    View Article
  103. Notes on some Costa Rican birds
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 14
    Issue: 869
    Date: 1891
    Page Range: 473--478
    View Article
  104. Notes on some Costa Rican birds
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of the United States National Museum
    Volume: v. 4, p. 333-337
    Date: 1881
    View Article (External)
  105. Notes on some Costa Rican birds
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of the United States National Museum
    Volume: v. 14, no. 869, p. 473-478
    Date: 1891
    View Article (External)
  106. Notes on the genus Sittasomus of Swainson
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 14
    Issue: 877
    Date: 1891
    Page Range: 507--510
    View Article
  107. Observations on the Farallon rail (Porzana jamaicensis coturniculus Baird)
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 13
    Issue: 828
    Date: 1890
    Page Range: 309--311
    View Article
  108. On a collection of birds made by Messrs. J. E. Benedict and W. Nye, of the United States Fish Commission steamer Albatross
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 7
    Issue: 420
    Date: 1884
    Page Range: 172--180
    View Article
  109. On a duck new to the North American fauna
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 4
    Issue: 188
    Date: 1881
    Page Range: 22--24
    View Article
  110. On a probable hybrid between Dryobates nuttallii (Gamb.) and D. pubescens gairdnerii (Aud.)
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 9
    Issue: 590
    Date: 1887
    Page Range: 521--522
    View Article
  111. On a small collection of birds from Costa Rica
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 16
    Issue: 956
    Date: 1893
    Page Range: 609--614
    View Article
  112. On a small collection of birds from Costa Rica
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of the United States National Museum
    Volume: v. 16, p. 609-614
    Date: 1893
    View Article (External)
  113. On Aestrelata sandwichensis Ridgw
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 9
    Issue: 556
    Date: 1886
    Page Range: 95--96
    View Article
  114. On birds collected by Doctor W. L. Abbott in the Seychelles, Amirantes, Gloriosa, Assumption, Aldabra, and adjacent islands, with notes on habits, etc., by the collector
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 18
    Issue: 1079
    Date: 1896
    Page Range: 509--546
    View Article
  115. On Buteo harlani (Aud.) and B. cooperi Cass
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 2
    Date: 1885
    Page Range: 165--166
    View Article
  116. On Cathartes burrovianus, Cassin, and C. urubitinga, Pelzeln
    By: Ridgway, Robert - Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 8
    Date: 1885
    Page Range: 34--36
    View Article
  117. On Fisher's Petrel (Æstrelata fisheri)
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 12
    Date: 1895
    Page Range: 319--322
    View Article
  118. On Geographical Variation in Sialia mexicana Swainson
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 11
    Date: 1894
    Page Range: 145--160
    View Article
  119. On Junco Cinereus (Swains.) and Its Geographical Races
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 2
    Date: 1885
    Page Range: 363--364
    View Article
  120. On Phrygilus gayi (Eyd. & Gerv.) and allied species
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 10
    Date: 1887
    Page Range: 431--435
    View Article
  121. On some Costa Rican birds, with description of several supposed new species
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of the United States National Museum
    Volume: v. 6, p. 410-415
    Date: 1883
    View Article (External)
  122. On the Buteonine Subgenus Craxirex, Gould
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The Academy of Natural Sciences of Philadelphia
    Volume: 27
    Date: 1875
    Page Range: 89--119
    View Article
  123. On the Correct Subspecific Title of Baird's Wren (No. 719 b, A. O. U. Check-List)
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 4
    Date: 1887
    Page Range: 349--350
    View Article
  124. On the Genus Astragalinus Cabanis
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 16
    Date: 1899
    Page Range: 79--80
    View Article
  125. On the Glaucous Gull of Bering's Sea and Contiguous Waters
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 3
    Date: 1886
    Page Range: 330--331
    View Article
  126. On the Possible Specific Identity of Buteo cooperi Cass. with B. harlani (Aud.)
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 1
    Date: 1884
    Page Range: 253--254
    View Article
  127. On the Proper Name for the Prairie Hen
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 3
    Date: 1886
    Page Range: 132--133
    View Article
  128. On the Status of Lanius robustus Baird as a North American Bird
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 14
    Date: 1897
    Page Range: 323--323
    View Article
  129. On Two Abnormally Colored Specimens of the Bluebird (Sialia sialis)
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 3
    Date: 1886
    Page Range: 282--283
    View Article
  130. Picicorvus an Untenable Genus
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 11
    Date: 1894
    Page Range: 179--179
    View Article
  131. Preliminary description of some new birds from the Galapagos Archipelago
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 18
    Issue: 1067
    Date: 1896
    Page Range: 293--294
    View Article
  132. Preliminary Descriptions of Some New Species of Birds from Southern Mexico, in the Collection of the Mexican Geographical and Exploring Commission
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 3
    Date: 1886
    Page Range: 331--333
    View Article
  133. Probable Breeding of the Red Crossbill (Loxia curvirostra americana) in Central Maryland
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 1
    Date: 1884
    Page Range: 292--293
    View Article
  134. Remarks on the avian genus Myiarchus, with special reference to M. yucatanensis Lawrence
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 16
    Issue: 955
    Date: 1893
    Page Range: 605--608
    View Article
  135. Remarks on the Californian Vulture (Pseudogryphus californianus)
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 2
    Date: 1885
    Page Range: 167--169
    View Article
  136. Remarks on the type specimens of Muscicapa fulvifrons, Giraud, and Mitrephorus pallescens, Coues
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The Biological Society of Washington
    Volume: 2
    Page Range: 108--110
    View Article
  137. A review of the American crossbills (Loxia) of the L. curvirostra type
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The Biological Society of Washington
    Volume: 2
    Page Range: 101--107
    View Article
  138. A review of the American species of the genus Scops, Savigny
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 1
    Issue: 21
    Date: 1878
    Page Range: 85--117
    View Article
  139. A review of the genus Centurus, Swainson
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 4
    Issue: 198
    Date: 1881
    Page Range: 93--119
    View Article
  140. A review of the genus Dendrocincla Gray
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 10
    Issue: 650
    Date: 1888
    Page Range: 488--497
    View Article
  141. A review of the genus Psittacula of Brisson
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 10
    Issue: 661
    Date: 1888
    Page Range: 529--548
    View Article
  142. A review of the genus Sclerurus of Swainson
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of the United States National Museum
    Volume: v. 12, p. 21-31
    Date: 1889
    View Article (External)
  143. A review of the genus Xiphocolaptes of Lesson
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of the United States National Museum
    Volume: v. 12, p. 1-20
    Date: 1889
    View Article (External)
  144. A revision of the genus Formicarius Boddaert
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 16
    Issue: 961
    Date: 1893
    Page Range: 667--686
    View Article
  145. A revision of the genus Formicarius Boddaert
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of the United States National Museum
    Volume: v. 16, p. 667-686
    Date: 1893
    View Article (External)
  146. Ridgway and Bendire's Directions for Collecting and Preparing Birds and Their Eggs and Nests
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 9
    Date: 1892
    Page Range: 175--176
    View Article
  147. Ridgway and Lucas on a New Family of Birds
    By: Ridgway, Robert, 1850-1929 - Lucas, Frederic A. (Frederic Augustus), 1852-1929
    Type: Article
    In: The Auk
    Volume: 13
    Date: 1896
    Page Range: 334--335
    View Article
  148. Ridgway on a Collection of Birds from Alaska
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 11
    Date: 1894
    Page Range: 169--169
    View Article
  149. Ridgway on Birds from the Galapagos Islands, the Abrolhos, the Island of Santa Lucia, and from the Straits of Magellan
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 7
    Date: 1890
    Page Range: 273--274
    View Article
  150. Ridgway on Birds from the Galapagos Islands, the Abrolhos, the Island of Santa Lucia, and from the Straits of Magellan
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 7
    Date: 1890
    Page Range: 273--274
    View Article
  151. Ridgway on New American Birds
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 2
    Date: 1885
    Page Range: 370--371
    View Article
  152. Ridgway on New Birds from Lower California
    By: Belding, L - Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 1
    Date: 1884
    Page Range: 284--285
    View Article
  153. Ridgway on New Birds from Mexico and the West Indies
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 10
    Date: 1893
    Page Range: 346--346
    View Article
  154. Ridgway on New Birds from Mexico and the West Indies
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 10
    Date: 1893
    Page Range: 346--346
    View Article
  155. Ridgway on New Birds from Mexico and the West Indies
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 10
    Date: 1893
    Page Range: 346--346
    View Article
  156. Ridgway on New Birds from the Galapagos Islands
    By: Ridgway, Robert, 1850-1929 - Abbott, W L
    Type: Article
    In: The Auk
    Volume: 12
    Date: 1895
    Page Range: 70--71
    View Article
  157. Ridgway on New Birds from the Galapagos Islands
    By: Ridgway, Robert, 1850-1929 - Abbott, W L
    Type: Article
    In: The Auk
    Volume: 12
    Date: 1895
    Page Range: 70--71
    View Article
  158. Ridgway on New Genera, Species, and Subspecies of Tropical American Birds
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 26
    Date: 1909
    Page Range: 321--321
    View Article
  159. Ridgway on New or Little-Known American Birds
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 5
    Date: 1888
    Page Range: 194--195
    View Article
  160. Ridgway on New Species and Subspecies of American Birds, and on the Nomenclature of Other Species
    By: Benedict, J E - Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 2
    Date: 1885
    Page Range: 290--293
    View Article
  161. Ridgway on New Species of Birds from Cozumel Island, Yucatan
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 2
    Date: 1885
    Page Range: 294--295
    View Article
  162. Ridgway on the American Families of Oligomyodian Passeres
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 23
    Date: 1906
    Page Range: 233--233
    View Article
  163. Ridgway on the American Red Crossbills
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 2
    Date: 1885
    Page Range: 206--207
    View Article
  164. Ridgway on the Genus Sclerurus
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 7
    Date: 1890
    Page Range: 272--273
    View Article
  165. Ridgway on the Genus Xiphocolaptes
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 7
    Date: 1890
    Page Range: 271--272
    View Article
  166. Ridgway on the Pied Wagtails of Eastern Asia
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 1
    Date: 1884
    Page Range: 387--387
    View Article
  167. Ridgway on the Type Specimen of Buteo Oxypterus Cassin
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 2
    Date: 1885
    Page Range: 371--371
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  168. Ridgway's 'Birds of North and Middle America.' Part I
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 19
    Date: 1902
    Page Range: 97--102
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  169. Ridgway's 'Birds of North and Middle America.' Part II
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 20
    Date: 1903
    Page Range: 73--76
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  170. Ridgway's Birds of North and Middle America. Part V
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 29
    Date: 1912
    Page Range: 256--257
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  171. Ridgway's Birds of the Galapagos Archipelago
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 14
    Date: 1897
    Page Range: 329--330
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  172. Ridgway's 'Manual of North American Birds'
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 4
    Date: 1887
    Page Range: 333--336
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  173. Ridgway's 'Manual of North American Birds,' Second Edition
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 14
    Date: 1897
    Page Range: 232--233
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  174. Ridgway's Nomenclature of Colors and Ornithologists' Compendium
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 4
    Date: 1887
    Page Range: 152--153
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  175. Ridgway's Ornithology of Illinois
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 12
    Date: 1895
    Page Range: 379--380
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  176. Ridgway's Ornithology of Illinois
    By: Forbes, S A - Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 7
    Date: 1890
    Page Range: 74--77
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  177. Ridgway's Ornithology of Illinois
    By: Forbes, S A - Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 7
    Date: 1890
    Page Range: 74--77
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  178. Ridgway's 'The Birds of North and Middle America' Part VII
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 33
    Date: 1916
    Page Range: 331--332
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  179. Ridgway's 'The Birds of North and Middle America,' Part III
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 22
    Date: 1905
    Page Range: 219--222
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  180. Ridgway's 'The Birds of North and Middle America,' Part IV
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 24
    Date: 1907
    Page Range: 450--451
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  181. Ridgway's 'The Birds of North and Middle America,' Part IV
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 24
    Date: 1907
    Page Range: 450--451
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  182. Ridgway's 'The Birds of North and Middle America,' Part VIII
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 36
    Date: 1919
    Page Range: 595--597
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  183. Ridgway's 'The Humming Birds'
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 9
    Date: 1892
    Page Range: 376--377
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  184. Salvin and Godman's Biologia Centrali-Americana-Aves
    By: Ridgway, Robert, 1850-1929 - Salvin, Osbert
    Type: Article
    In: The Auk
    Volume: 7
    Date: 1890
    Page Range: 189--195
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  185. Scientific results of explorations by the U. S. Fish Commission steamer Albatross. No. II..Birds collected on the Island of Santa Lucia, West Indies, the Abrolhos Islands, Brazil, and at the Straits of Magellan, in 1887-'88
    By: Ridgway, Robert - Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 12
    Date: 1890
    Page Range: 129--139
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  186. Scientific results of explorations by the U. S. Fish Commission steamer Albatross. No. XXVII..Catalogue of a collection of birds made in Alaska by Mr. C. H. Townsend during the cruise of the U. S. Fish Commission steamer Albatross, in the summer and autumn of 1888
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The United States National Museum
    Volume: 16
    Date: 1893
    Page Range: 663--665
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  187. The Scissor-Tailed Flycatcher (Milvulus Forficatus) at Key West
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 3
    Date: 1886
    Page Range: 134--135
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  188. Second Supplement to the American Ornithologists' Union Check-List of North American Birds
    By: Allen, J A - Brewster, William - Coues , Elliott - Ridgway, Robert, 1850-1929 - Sage, John H
    Type: Article
    In: The Auk
    Volume: 7
    Date: 1890
    Page Range: 60--66
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  189. Seventh Supplement to the American Ornithologists' Union Check-List of North American Birds
    By: Coues , Elliott - Allen, J A - Brewster, William - Merriam, C Hart - Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 12
    Date: 1895
    Page Range: 163--169
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  190. A Singularly Marked Specimen of Sphyrapicus Thyroideus
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 4
    Date: 1887
    Page Range: 75--76
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  191. Sixth Supplement to the American Ornithologists' Union Check-List of North American Birds
    By: Coues , Elliott - Allen, J A - Brewster, William - Merriam, C Hart - Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 11
    Date: 1894
    Page Range: 46--51
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  192. Some observations concerning the American families of oligomyodian passeres
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of the Biological Society of Washington
    Volume: 19
    Date: 1906-01-29
    Page Range: 7--16
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  193. Spencer Fullerton Baird
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 5
    Date: 1888
    Page Range: 1--14
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  194. Spring Arrivals at Washington, D. C
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 9
    Date: 1892
    Page Range: 307--308
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  195. Studies of the American Falconidæ: Monograph of the Genus Micrastur
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: Proceedings of The Academy of Natural Sciences of Philadelphia
    Volume: 27
    Date: 1875
    Page Range: 470--502
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  196. Supplementary Remarks on the Genus Psittacula Brisson
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 5
    Date: 1888
    Page Range: 460--462
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  197. Thayer and Bangs on the Birds of Guadaloupe Island
    By: Thayer, John Eliot, 1862-1933 - Bangs, Outram - Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 26
    Date: 1909
    Page Range: 319--320
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  198. Thayer and Bangs on the Birds of Guadaloupe Island
    By: Thayer, John Eliot, 1862-1933 - Bangs, Outram - Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 26
    Date: 1909
    Page Range: 319--320
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  199. Third Supplement to the American Ornithologists' Union Check-List of North American Birds
    By: Sage, John H - Allen, J A - Brewster, William - Coues , Elliott - Henshaw, H W - Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 8
    Date: 1891
    Page Range: 83--90
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  200. 'Water Birds of North America':'A Few Corrections' Rectified
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Auk
    Volume: 3
    Date: 1886
    Page Range: 266--268
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  201. A winter with the birds in Costa Rica
    By: Ridgway, Robert, 1850-1929
    Type: Article
    In: The Condor
    Volume: v. 7, no. 6, p. 151-160
    Date: 1905
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