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In Memoriam: Thomas McIlwraith. Born 25th December, 1824. Died 31st January, 1903
Vol 21, Page 1, Date 1904
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On the Habits of the Laysan Albatross
Vol 21, Page 8, Date 1904
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Nesting Habits of the Herodiones in Florida
Vol 21, Page 20, Date 1904
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Summer Birds of the Leech Lake Region, Minnesota
Vol 21, Page 29, Date 1904
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Bird Migration Phenomena in the Extreme Lower Mississippi Valley
Vol 21, Page 45, Date 1904
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The Correct Name of the Pacific Dunlin
Vol 21, Page 50, Date 1904
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An Abnormal Bill of Melanerpes portoricensis
Vol 21, Page 53, Date 1904
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Some Nova Scotia Birds
Vol 21, Page 55, Date 1904
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The Exaltation of the Subspecies
Vol 21, Page 64, Date 1904
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Yosemite Valley Birds
Vol 21, Page 66, Date 1904
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Twenty-First Congress of the American Ornithologists' Union
Vol 21, Page 74, Date 1904
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Empidonax Griseus Brewst. = E. canescens Salv. & Godm
Vol 21, Page 80, Date 1904
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Extension of the Breeding Range of the Prairie Horned Lark (Otocoris alpestris praticola) to the Eastern Coast
Vol 21, Page 81, Date 1904
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The Bachman Sparrow (Peucæa æstivalis backmanii) in the Vicinity of Cincinnati, Ohio
Vol 21, Page 82, Date 1904
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Kirtland's Warbler (Dendroica kirtlandi) on the Coast of South Carolina
Vol 21, Page 83, Date 1904
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A Few Southern Michigan Notes
Vol 21, Page 84, Date 1904
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The Black-Bellied Plover, Road-Runner, and Black-Throated Green Warbler in Kansas
Vol 21, Page 85, Date 1904
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Jones's 'The Birds of Ohio'
Vol 21, Page 90, Date 1904
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Anderson and Grinnell on the Birds of the Siskiyou Mountains, California
Vol 21, Page 91, Date 1904
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Sharpe's 'Hand List of the Genera and Species of Birds.' Volume IV
Vol 21, Page 92, Date 1904
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Ridgway on New American Birds
Vol 21, Page 93, Date 1904
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The Avicultural Magazine
Vol 21, Page 95, Date 1904
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Seth-Smith's Handbook of Parrakeets
Vol 21, Page 96, Date 1904
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Report of the A. O. U. Committee on the Protection of North American Birds for the Year 1903
Vol 21, Page 97, Date 1904
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Masked Bob-White (Colinus ridgwayi)
Vol 21, Page 209, Date 1904
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Curved-Billed and Palmer's Thrashers
Vol 21, Page 214, Date 1904
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San Clemente Island and Its Birds
Vol 21, Page 218, Date 1904
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A List of Land Birds from Central and Southeastern Washington
Vol 21, Page 223, Date 1904
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Birds of Allegany and Garrett Counties, Western Maryland
Vol 21, Page 234, Date 1904
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The Obligations of the Student of Animal Behavior
Vol 21, Page 251, Date 1904
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Unpublished Letters of John James Audubon and Spencer F. Baird
Vol 21, Page 255, Date 1904
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Nesting Habits of the Herodiones in Florida. (Concluded)
Vol 21, Page 259, Date 1904
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The Rhythmical Song of the Wood Pewee
Vol 21, Page 270, Date 1904
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The Status of Melospiza lincolni striata Brewster
Vol 21, Page 274, Date 1904
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Capture of Krider's Hawk at St. Marys, Georgia
Vol 21, Page 277, Date 1904
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Whip-Poor-Will (Antrostomus vociferus), a New Bird for Colorado
Vol 21, Page 278, Date 1904
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Another Abnormal Bill
Vol 21, Page 279, Date 1904
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The Pine Grosbeak on Long Island, N. Y
Vol 21, Page 280, Date 1904
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The Pine Grosbeak on Long Island, N. Y
Vol 21, Page 281, Date 1904
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Another Nest of the Philadelphia Vireo
Vol 21, Page 282, Date 1904
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A Winter Record for the Hermit Thrush (Hylocichla guttata pallasii) in Eastern Massachusetts
Vol 21, Page 283, Date 1904
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Mortality among Young Birds, Due to Excessive Rains
Vol 21, Page 284, Date 1904
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The Rapidity of the Wing-Beats of Birds
Vol 21, Page 286, Date 1904
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Notes concerning Certain Birds of Long Island, N. Y
Vol 21, Page 287, Date 1904
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British Columbia Notes
Vol 21, Page 289, Date 1904
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The Ipswich Sparrow, Kirtland's Warbler, and Sprague's Pipit in Georgia
Vol 21, Page 291, Date 1904
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Coues's 'key to North American Birds,' Fifth Edition
Vol 21, Page 292, Date 1904
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Chapman's 'Color Key to North American Birds'
Vol 21, Page 296, Date 1904
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Dawson's 'The Birds of Ohio'
Vol 21, Page 297, Date 1904
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Mrs. Bailey's 'Handbook of Birds of the Western United States' Second Edition
Vol 21, Page 299, Date 1904
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Torrey's 'The Clerk of the Woods'
Vol 21, Page 300, Date 1904
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Mrs. Miller's 'With the Birds in Maine'
Vol 21, Page 301, Date 1904
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Silloway's 'The Birds of Fergus County, Montana'
Vol 21, Page 302, Date 1904
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Oberholser's 'Review of the Wrens of the Genus Troglodytes'
Vol 21, Page 303, Date 1904
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Oberholser on the American Great Horned Owls
Vol 21, Page 304, Date 1904
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Snodgrass and Heller on the 'Birds of the Galapagos Archipelago'
Vol 21, Page 305, Date 1904
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Shufeldt on the Osteology of the Halcyones and Limicolæ
Vol 21, Page 306, Date 1904
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Recent Papers on Economic Ornithology
Vol 21, Page 307, Date 1904
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Summary of Game Laws for 1903
Vol 21, Page 309, Date 1904
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Notes and News
Vol 21, Page 310, Date 1904
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The Biology of the Tyrannidæ with Respect to Their Systematic Arrangement
Vol 21, Page 313, Date 1904
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A Discussion of the Origin of Migration
Vol 21, Page 322, Date 1904
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Extracts from an Unpublished Journal of John James Audubon
Vol 21, Page 334, Date 1904
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The Effect of Altitude on Bird Migration
Vol 21, Page 338, Date 1904
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Spring Bird Migrations of 1903
Vol 21, Page 341, Date 1904
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The Case of Megalestris vs. Catharacta
Vol 21, Page 345, Date 1904
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Additional Notes on the Birds of the Upper Pecos
Vol 21, Page 349, Date 1904
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The Origin and Distribution of the Chest-Nut-Backed Chickadee
Vol 21, Page 364, Date 1904
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European Widgeon in Southern California
Vol 21, Page 383, Date 1904
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How an Abnormal Growth of Bill Was Caused
Vol 21, Page 384, Date 1904
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Nelson's Sharp-Tailed Sparrow in North Dakota
Vol 21, Page 385, Date 1904
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Henslow's Sparrow at Bethlehem, Pa. A Correction
Vol 21, Page 386, Date 1904
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Breeding of Lawrence Warbler in New York City
Vol 21, Page 387, Date 1904
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Myrtle Warblers Wintering in Maine
Vol 21, Page 388, Date 1904
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Phyllopseustes versus Phylloscopus
Vol 21, Page 390, Date 1904
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Dates of Nesting of Bermuda Birds
Vol 21, Page 391, Date 1904
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Scott Oriole, Gray Vireo, and Phœbe in Northeastern New Mexico
Vol 21, Page 392, Date 1904
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Hoffmann's 'Guide to the Birds of New England and Eastern New York
Vol 21, Page 393, Date 1904
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Hornaday's 'The American Natural History'
Vol 21, Page 394, Date 1904
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The 'Baby Pathfinder to the Birds'
Vol 21, Page 395, Date 1904
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Proceedings of the Delaware Valley Ornithological Club
Vol 21, Page 396, Date 1904
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Boardman's 'The Naturalist of the Saint Croix'
Vol 21, Page 397, Date 1904
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Pearson's 'Three Summers among the Birds of Russian Lapland'
Vol 21, Page 398, Date 1904
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Jacobs's 'The Haunts of the Golden-Winged Warbler'
Vol 21, Page 399, Date 1904
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Scott on 'The Inheritance of Song in Passerine Birds'
Vol 21, Page 400, Date 1904
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Rhoads on the Extinction of the Dickcissel East of the Alleghanies
Vol 21, Page 401, Date 1904
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Bartsch on the Herons of the District of Columbia
Vol 21, Page 402, Date 1904
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Nelson on New Birds from Mexico
Vol 21, Page 403, Date 1904
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Code of Botanical Nomenclature
Vol 21, Page 404, Date 1904
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A Method of Obtaining a Temporary Stability of Names
Vol 21, Page 406, Date 1904
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Notes and News
Vol 21, Page 407, Date 1904
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Thirteenth Supplement to the American Ornithologists' Union Check-List of North American Birds
Vol 21, Page 411, Date 1904
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A Fortnight on the Farallones
Vol 21, Page 425, Date 1904
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Additions to Mitchell's List of the Summer Birds of San Miguel County, New Mexico
Vol 21, Page 443, Date 1904
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A Preliminary List of the Birds of Leon County, Florida
Vol 21, Page 449, Date 1904
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Nesting Habits of the Woodpeckers and the Vultures in Mississippi
Vol 21, Page 463, Date 1904
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The Birds of West Baton Rouge Parish, Louisiana
Vol 21, Page 472, Date 1904
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Note on the Generic Names Bellona, Orthorhynchus, Chrysolampis, and Eulampis
Vol 21, Page 485, Date 1904
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The Bobolink in Colorado
Vol 21, Page 486, Date 1904
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Another Nest of Kirtland's Warbler
Vol 21, Page 487, Date 1904
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An Interesting Variation in Seiurus
Vol 21, Page 488, Date 1904
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The Raven in Southern New Hampshire, and Other Notes
Vol 21, Page 491, Date 1904
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The International Catalogue of Scientific Literature
Vol 21, Page 494, Date 1904
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Cooke's 'Some New Facts about the Migration of Birds'
Vol 21, Page 501, Date 1904
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G. M. Allen's 'The Birds of New Hampshire'
Vol 21, Page 503, Date 1904
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Todd's Birds of Erie, Pa
Vol 21, Page 505, Date 1904
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Kirtland's Warbler
Vol 21, Page 506, Date 1904
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Forbush on the Destruction of Birds by the Elements
Vol 21, Page 507, Date 1904
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Judd's 'The Economic Value of the Bobwhite'
Vol 21, Page 509, Date 1904
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Notes and News
Vol 21, Page 510, Date 1904