The Auk - American Ornithologists' Union. (American Ornithologists' Union, etc, 1876)

The Auk - American Ornithologists' Union. (American Ornithologists' Union, etc, 1876)

The Auk - American Ornithologists' Union. (American Ornithologists' Union, etc, 1876)

The Auk - American Ornithologists' Union. (American Ornithologists' Union, etc, 1876)

The Auk - American Ornithologists' Union. (American Ornithologists' Union, etc, 1915)

The Auk - American Ornithologists' Union. (American Ornithologists' Union, etc, 1915)

The Auk - American Ornithologists' Union. (American Ornithologists' Union, etc, 1915)

The Auk - American Ornithologists' Union. (American Ornithologists' Union, etc, 1915)

The Auk - American Ornithologists' Union. (American Ornithologists' Union, etc, 1915)

The Auk - American Ornithologists' Union. (American Ornithologists' Union, etc, 1915)

The Auk - American Ornithologists' Union. (American Ornithologists' Union, etc, 1915)

The Auk - American Ornithologists' Union. (American Ornithologists' Union, etc, 1915)

The Auk - American Ornithologists' Union. (American Ornithologists' Union, etc, 1915)

The Auk - American Ornithologists' Union. (American Ornithologists' Union, etc, 1915)

The Auk - American Ornithologists' Union. (American Ornithologists' Union, etc, 1915)

[Austin Rand's journal, 3rd Archbold Expedition to New Guinea] - American Museum of Natural History (1938)

The Australian zoologist - Royal Zoological Society of New South Wales. (Royal Zoological Society of New South Wales, 1914)

The Australian zoologist - Royal Zoological Society of New South Wales. (Royal Zoological Society of New South Wales, 1921)

The Australian zoologist - Royal Zoological Society of New South Wales. (Royal Zoological Society of New South Wales, 1944)

An authentic history of Lancaster County, in the state of Pennsylvania - Mombert, J. I. (Jacob Isidor), 1829 -1913 (J.E. Barr & Co, 1869)

An authentic history of Lancaster County : in the state of Pennsylvania - Mombert, J. I. (Jacob Isidor), 1829 -1913 (J.E. Barr & Co, 1869)

Aves de México : lista actualizada de especies y nombres comunes 2015 - Gómez de Silva, Héctor (Comisión Nacional para el Conocimiento y Uso de la Biodiversidad (CONABIO), 2015)

As aves do Estado de S. Paulo - Ihering, H. von (Hermann), 1850 -1930 (Typ. a vapor de Hennies irmãos, 1898)

As aves do Estado de S. Paulo - Ihering, H. von (Hermann), 1850 -1930 (Typ. a vapor de Hennies irmãos, 1898)

As aves do Estado de S. Paulo - Ihering, H. von (Hermann), 1850 -1930 (Typ. a vapor de Hennies irmãos, 1898)

Aves nuevas del Paraguay. Continuación á Azara - Bertoni, Arnaldo de Winkelried, 1878 -1973 (Talleres nacionales de H. Kraus, 1901)

Aves polynesiae : a catalogue of the birds of the Polynesian subregion - Wiglesworth, Lionel W. (Lionel William), 1865 -1901 (R. Friedlaender & Sohn, 1891)

Aves polynesiae : a catalogue of the birds of the Polynesian subregion - Wiglesworth, Lionel W. (Lionel William), 1865 -1901 (R. Friedlaender & Sohn, 1891)

Aves polynesiae : a catalogue of the birds of the Polynesian subregion - Wiglesworth, Lionel W. (Lionel William), 1865 -1901 (R. Friedlaender & Sohn, 1891)

Aves polynesiae : a catalogue of the birds of the Polynesian subregion - Wiglesworth, Lionel W. (Lionel William), 1865 -1901 (R. Friedlaender & Sohn, 1891)

Avian responses to management of riparian habitat in the Prineville District, Bureau of Land Management, Central Oregon, draft : report of 1999 and 2000 field activities - United States. Bureau of Land Management. Oregon State Office. (Wildlife Conservation Society, North American Program, 2000)

The Avicultural magazine - Avicultural Society. (Avicultural Society, etc, 2007)

The Avicultural magazine - Avicultural Society. (Avicultural Society, etc, 2007)

The avifauna of British India and its dependencies : a systematic account, with descriptions of all the known species of birds inhabiting British India, observations on their habits, nidification, &c., tables of their geographical distribution in Persia, Beloochistan, Afghanistan, Sind, Punjab, N.W. provinces, and the peninsular of India generally - Murray, James A., F.S.A.L. (Trübner, 1888)

The avifauna of British India and its dependencies : a systematic account, with descriptions of all the known species of birds inhabiting British India, observations on their habits, nidification, &c., tables of their geographical distribution in Persia, Beloochistan, Afghanistan, Sind, Punjab, N.W. provinces, and the peninsular of India generally - Murray, James A., F.S.A.L. (Trübner, 1888)

Avifauna of the Cerro de la Muerte region, Costa Rica - Wolf, Larry L. (American Museum of Natural History, 1976)

Avifauna of the Eastern Highlands of New Guinea - Diamond, Jared M. ([Nuttall Ornithological Club], 1972)

B. Eyferth's Einfachste Lebensformen des Tier- und Pflanzenreiches : Naturgeschichte der mikroskopischen Süsswasserbewohner - Eyferth, B. (Bruno), 1826 -1897 (B. Goeritz, 1900)

B. Eyferth's Einfachste Lebensformen des Tier- und Pflanzenreiches : Naturgeschichte der mikroskopischen Süsswasserbewohner - Eyferth, B. (Bruno), 1826 -1897 (B. Goeritz, 1900)

B. Eyferth's Einfachste Lebensformen des Tier- und Pflanzenreiches : Naturgeschichte der mikroskopischen Süsswasserbewohner - Eyferth, B. (Bruno), 1826 -1897 (B. Goeritz, 1900)

Banisteria : a journal devoted to the natural history of Virginia - Virginia Natural History Society. (Virginia Natural History Society, 2013)

Bericht über die Leistungen in der Naturgeschichte der Vögel - Pelzeln, August von, 1825 -1891 (1847)

Bericht über die Leistungen in der Naturgeschichte der Vögel - Pelzeln, August von, 1825 -1891 (1847)

Bericht über die Leistungen in der Naturgeschichte der Vögel - Pelzeln, August von, 1825 -1891 (1847)

Bericht über die Leistungen in der Naturgeschichte der Vögel - Pelzeln, August von, 1825 -1891 (1847)

Bericht über die Leistungen in der Naturgeschichte der Vögel - Pelzeln, August von, 1825 -1891 (1847)

Bericht über die Leistungen in der Naturgeschichte der Vögel - Pelzeln, August von, 1825 -1891 (1847)

Bericht über die Leistungen in der Naturgeschichte der Vögel - Pelzeln, August von, 1825 -1891 (1847)

Bericht über die Leistungen in der Naturgeschichte der Vögel - Pelzeln, August von, 1825 -1891 (1847)

Bericht über die Leistungen in der Naturgeschichte der Vögel - Pelzeln, August von, 1825 -1891 (1847)

Bericht über die Leistungen in der Naturgeschichte der Vögel - Pelzeln, August von, 1825 -1891 (1882)

Bericht über die Leistungen in der Naturgeschichte der Vögel - Pelzeln, August von, 1825 -1891 (1882)

Bericht über die Leistungen in der Naturgeschichte der Vögel - Pelzeln, August von, 1825 -1891 (1882)

Bericht über die Leistungen in der Naturgeschichte der Vögel - Pelzeln, August von, 1825 -1891 (1882)

Bericht über die Leistungen in der Naturgeschichte der Vögel - Pelzeln, August von, 1825 -1891 (1882)

Bericht über die Leistungen in der Naturgeschichte der Vögel - Pelzeln, August von, 1825 -1891 (1884)

Bericht über die Leistungen in der Naturgeschichte der Vögel - Pelzeln, August von, 1825 -1891 (1884)

Bericht über die Leistungen in der Naturgeschichte der Vögel - Pelzeln, August von, 1825 -1891 (1882)

Bericht über die Leistungen in der Naturgeschichte der Vögel - Pelzeln, August von, 1825 -1891 (1882)

Bericht über die Leistungen in der Naturgeschichte der Vögel - Pelzeln, August von, 1825 -1891 (1888)

Bericht über die Leistungen in der Naturgeschichte der Vögel - Pelzeln, August von, 1825 -1891 (1882)

Bericht über die Leistungen in der Naturgeschichte der Vögel - Pelzeln, August von, 1825 -1891 (1882)

Bericht über die Leistungen in der Naturgeschichte der Vögel - Pelzeln, August von, 1825 -1891 (1882)

Bericht über die Leistungen in der Naturgeschichte der Vögel - Pelzeln, August von, 1825 -1891 (1882)

Berichte uber die wissenschaftlichen Leistungen in der Naturgeschichte der niederen Thiere während des Jahres ... - Leuckart, Rudolf, 1823 -1898 (Nicolai, 1866)

Bibliographia zoologica - Concilium Bibliographicum. (Wilhelm Engelmann, 1896)

Bibliographia zoologica - Concilium Bibliographicum. (Wilhelm Engelmann, 1897)

Bibliographia zoologica - Concilium Bibliographicum. (Wilhelm Engelmann, 1897)

Bibliographia zoologica - Concilium Bibliographicum. (Wilhelm Engelmann, 1897)

Bibliographia zoologica - Concilium Bibliographicum. (Wilhelm Engelmann, 1900)

Bibliographia zoologica - Concilium Bibliographicum. (Wilhelm Engelmann, 1905)

Bibliographia zoologica - Concilium Bibliographicum. (Wilhelm Engelmann, 1906)

Bibliographia zoologica - Concilium Bibliographicum. (Wilhelm Engelmann, 1909)

Bibliographia zoologica - Concilium Bibliographicum. (Wilhelm Engelmann, 1909)

Bibliographia zoologica - Concilium Bibliographicum. (Wilhelm Engelmann, 1910)

Bibliographia zoologica - Concilium Bibliographicum. (Wilhelm Engelmann, 1910)

Bibliographia zoologica - Concilium Bibliographicum. (Wilhelm Engelmann, 1910)

Bibliographia zoologica - Concilium Bibliographicum. (Wilhelm Engelmann, 1910)

Bibliographia zoologica - Concilium Bibliographicum. (Wilhelm Engelmann, 1911)

Bibliographia zoologica - Concilium Bibliographicum. (Wilhelm Engelmann, 1912)

Bibliographia zoologica - Concilium Bibliographicum. (Wilhelm Engelmann, 1911)

Bibliographia zoologica - Concilium Bibliographicum. (Wilhelm Engelmann, 1914)

Bibliographia zoologica - Concilium Bibliographicum. (Wilhelm Engelmann, 1914)

A bibliography of birds : with special reference to anatomy, behavior, biochemistry Part 3 Subject index - Field Museum of Natural History. (Field Museum of Natural History, 1946)

A bibliography of birds : with special reference to anatomy, behavior, biochemistry Part 3 Subject index - Field Museum of Natural History. (Field Museum of Natural History, 1946)

A bibliography of birds : with special reference to anatomy, behavior, biochemistry Part 2 Author catalogue K to Z - Field Museum of Natural History. (Field Museum of Natural History, 1939)

A bibliography of birds : with special reference to anatomy, behavior, biochemistry Part 4 Finding index - Field Museum of Natural History. (Field Museum of Natural History, 1959)

A bibliography of birds : with special reference to anatomy, behavior, biochemistry Part 3 Subject index - Field Museum of Natural History. (Field Museum of Natural History, 1946)

A bibliography of birds : with special reference to anatomy, behavior, biochemistry Part 3 Subject index - Field Museum of Natural History. (Field Museum of Natural History, 1946)

Bibliotheca zoologica II. verzeichness der schriften über zoologie welche in den periodischen werken enthalten und vom jahre 1861-1880 selbständig erschienen sind, mit einschluss der allgemein-naturgeschichtlichen, periodischen und paleontologischen schriften - Carus, Julius Victor, 1823 -1903 (Wilhelm Engelmann, 1887)

Bibliotheca zoologica II. verzeichness der schriften über zoologie welche in den periodischen werken enthalten und vom jahre 1861-1880 selbständig erschienen sind, mit einschluss der allgemein-naturgeschichtlichen, periodischen und paleontologischen schriften - Carus, Julius Victor, 1823 -1903 (Wilhelm Engelmann, 1887)

Binomial and trinomial index to The auk, 1884-1940, also including the Nuttall bulletin, 1876-1883, and the A.O.U. check-list of North American birds (all seven editions) - Pollock, Andrew W. ([Andrew W. Pollock III], 2015)

Binomial and trinomial index to The auk, 1884-1940, also including the Nuttall bulletin, 1876-1883, and the A.O.U. check-list of North American birds (all seven editions) - Pollock, Andrew W. ([Andrew W. Pollock III], 2015)

Binomial and trinomial index to The auk, 1884-1940, also including the Nuttall bulletin, 1876-1883, and the A.O.U. check-list of North American birds (all seven editions) - Pollock, Andrew W. ([Andrew W. Pollock III], 2015)

Binomial and trinomial index to The auk, 1884-1940, also including the Nuttall bulletin, 1876-1883, and the A.O.U. check-list of North American birds (all seven editions) - Pollock, Andrew W. ([Andrew W. Pollock III], 2015)

Binomial and trinomial index to The auk, 1884-1940, also including the Nuttall bulletin, 1876-1883, and the A.O.U. check-list of North American birds (all seven editions) - Pollock, Andrew W. ([Andrew W. Pollock III], 2015)

Binomial and trinomial index to The auk, 1884-1940, also including the Nuttall bulletin, 1876-1883, and the A.O.U. check-list of North American birds (all seven editions) - Pollock, Andrew W. ([Andrew W. Pollock III], 2015)

Binomial and trinomial index to The auk, 1884-1940, also including the Nuttall bulletin, 1876-1883, and the A.O.U. check-list of North American birds (all seven editions) - Pollock, Andrew W. ([Andrew W. Pollock III], 2015)

La biodiversidad en Chiapas : estudio de estado - Cruz Angón, Andrea (Comisión Nacional para el Conocimiento y Uso de la Biodiversidad (CONABIO), 2013)

La biodiversidad en Michoacán: estudio de estado - Leal Nares, Oscar Adrián (Comisión Nacional para el Conocimiento y Uso de la Biodiversidad (CONABIO), 2005)

La biodiversidad en Michoacán: estudio de estado - Leal Nares, Oscar Adrián (Comisión Nacional para el Conocimiento y Uso de la Biodiversidad (CONABIO), 2005)

La biodiversidad en Michoacán estudio de estado 2 - Cruz Angón, Andrea (Comisión Nacional para el Conocimiento y Uso de la Biodiversidad (CONABIO), 2019)

La biodiversidad en Veracruz : estudio de estado - Cruz Angón, Andrea (Comisión Nacional para el Conocimiento y Uso de la Biodiversidad (CONABIO), 2011)

Biologia centrali-americana: Aves - Godman, Frederick Du Cane, 1834 -1919 (R.H. Porter], 1888)

Biologia Centrali-Americana :zoology, botany and archaeology - Godman, Frederick Du Cane, 1834 -1919 (Published for the editors by R. H. Porter], 1888)

Biologisches Centralblatt - Rosenthal, I. (Isidor), 1836 -1915 (Verlag von Georg Thieme, 1893)

The biologist's handbook of pronunciations - Jaeger, Edmund C. (Edmund Carroll) 1887 -1983 (Thomas, 1960)

Bird studies; an account of the land birds of eastern North America - Scott, William Earl Dodge, 1852 -1910 (G. P. Putnam's Sons, 1898)

Birds and mammals of the Stikine River region of northern British Columbia and southeastern Alaska - Swarth, Harry S. (Harry Schelwald), 1878 -1935 (University of California Press, 1922)

Birds - Baird, Spencer Fullerton, 1823 -1887 (1858)

Birds - Baird, Spencer Fullerton, 1823 -1887 (1858)

Birds - Baird, Spencer Fullerton, 1823 -1887 (1858)

Birds - Baird, Spencer Fullerton, 1823 -1887 (1858)

Birds - Baird, Spencer Fullerton, 1823 -1887 (1858)

Birds - Baird, Spencer Fullerton, 1823 -1887 (1858)

Birds in Kansas - Thompson, Max C. (University of Kansas, Museum of Natural History, 1989)

Birds in Kansas - Thompson, Max C. (University of Kansas, Museum of Natural History, 1989)

The birds of Africa, comprising all the species which occur in the Ethiopian region - Sclater, William Lutley, 1863 -1944 (Published for the author by R.H. Porter (18 Princes Street, Cavendish Square, W.), 1896)

Birds of Algonquin Provincial Park, Ontario - Royal Ontario Museum of Zoology. (s.n.], 1938)

The Birds of Australia - Grönvold, Henrik, 1858 -1940 (Witherby & Co, 1918)

The birds of British Guiana : based on the collection of Frederick Vavasour McConnell - Chubb, Charles, 1851 -1924 (Bernard Quaritch, 1916)

The birds of British Guiana : based on the collection of Frederick Vavasour McConnell - Chubb, Charles, 1851 -1924 (Bernard Quaritch, 1916)

The birds of Celebes and the neighbouring islands - Meyer, Adolf Bernhard, 1840 -1911 (R. Friedländer & Sohn, 1898)

The birds of Celebes and the neighbouring islands - Meyer, Adolf Bernhard, 1840 -1911 (R. Friedländer & Sohn, 1898)

The birds of Celebes and the neighbouring islands - Meyer, Adolf Bernhard, 1840 -1911 (R. Friedländer & Sohn, 1898)

The birds of Celebes and the neighbouring islands - Meyer, Adolf Bernhard, 1840 -1911 (R. Friedländer & Sohn, 1898)

The birds of Celebes and the neighbouring islands - Meyer, Adolf Bernhard, 1840 -1911 (R. Friedländer & Sohn, 1898)

The birds of Celebes and the neighbouring islands - Meyer, Adolf Bernhard, 1840 -1911 (R. Friedländer & Sohn, 1898)

The birds of Celebes and the neighbouring islands - Meyer, Adolf Bernhard, 1840 -1911 (R. Friedländer & Sohn, 1898)

The birds of Celebes and the neighbouring islands - Meyer, Adolf Bernhard, 1840 -1911 (R. Friedländer & Sohn, 1898)

The birds of Celebes and the neighbouring islands - Meyer, Adolf Bernhard, 1840 -1911 (R. Friedländer & Sohn, 1898)

The birds of Celebes and the neighbouring islands - Meyer, Adolf Bernhard, 1840 -1911 (R. Friedländer & Sohn, 1898)

The birds of Celebes and the neighbouring islands - Meyer, Adolf Bernhard, 1840 -1911 (R. Friedländer & Sohn, 1898)

The birds of Celebes and the neighbouring islands - Meyer, Adolf Bernhard, 1840 -1911 (R. Friedländer & Sohn, 1898)

The birds of Celebes and the neighbouring islands - Meyer, Adolf Bernhard, 1840 -1911 (R. Friedländer & Sohn, 1898)

The birds of Celebes and the neighbouring islands - Meyer, Adolf Bernhard, 1840 -1911 (R. Friedländer & Sohn, 1898)

The birds of Celebes and the neighbouring islands - Meyer, Adolf Bernhard, 1840 -1911 (R. Friedländer & Sohn, 1898)

The birds of Celebes and the neighbouring islands - Meyer, Adolf Bernhard, 1840 -1911 (R. Friedländer & Sohn, 1898)

The birds of Celebes and the neighbouring islands - Meyer, Adolf Bernhard, 1840 -1911 (R. Friedländer & Sohn, 1898)

The birds of Celebes and the neighbouring islands - Meyer, Adolf Bernhard, 1840 -1911 (R. Friedländer & Sohn, 1898)

The birds of Celebes and the neighbouring islands - Meyer, Adolf Bernhard, 1840 -1911 (R. Friedländer & Sohn, 1898)

Birds of Chautauqua county : an address delivered before the Chautauqua Society of History and Natural Science at its semi-annual meeting held in Jamestown, January 29, 1885 - Edson, John M. (Geo. H. Tiffany, 1886)

The birds of east Pennsylvania and New Jersey - Turnbull, William Paterson, 1830 -1871 (H. Grambo & Co, 1869)

The birds of east Pennsylvania and New Jersey - Turnbull, William Paterson, 1830 -1871 (H. Grambo & Co, 1869)

Birds of eastern Canada - Taverner, P. A. (Percy Algernon), 1875 -1947 (J. de L. Taché, Printer, 1919)

The birds of eastern North America known to occur east of the ninetieth meridian - Field Columbian Museum. (Printed for the Field Columbian Museum [by A. Mudge], 1899)

The birds of eastern North America : with original descriptions of all the species which occur east of the Mississippi River, between the Arctic circle and the Gulf of Mexico, with full notes upon their habits, etc - Maynard, C. J. (Charles Johnson), 1845 -1929 (C.J. Maynard & co, 1896)

The birds of eastern North America : with original descriptions of all the species which occur east of the Mississippi River, between the Arctic circle and the Gulf of Mexico, with full notes upon their habits, etc - Maynard, C. J. (Charles Johnson), 1845 -1929 (C.J. Maynard & co, 1896)

The birds of eastern North America : with original descriptions of all the species which occur east of the Mississippi River, between the Arctic circle and the Gulf of Mexico, with full notes upon their habits, etc - Maynard, C. J. (Charles Johnson), 1845 -1929 (C.J. Maynard & Co, 1872)

The birds of El Salvador - Dickey, Donald R. (Donald Ryder), 1887 -1932 (Field Museum of Natural History, 1938)

The birds of Illinois and Wisconsin - Cory, Charles B. (Charles Barney), 1857 -1921 (Field Museum of Natural History, 1909)

The birds of Illinois and Wisconsin - Cory, Charles B. (Charles Barney), 1857 -1921 (1909)

The birds of Illinois and Wisconsin - Cory, Charles B. (Charles Barney), 1857 -1921 (1909)

The birds of Long Island - Giraud, J. P. (Jacob Post), 1811 -1870 (Wiley & Putnam, 1844)

Birds of Massachusetts - Allen, J. A. (Joel Asaph), 1838 -1921 (1864)

Birds of Massachusetts - Allen, J. A. (Joel Asaph), 1838 -1921 (1864)

Birds of Michigan - Cook, Albert John, 1842 -1916 (R. Smith & co., state printers and binders, 1893)

The birds of New England - Samuels, Edward A. (Edward Augustus), 1836 -1908 (Noyes, Holmes, 1870)

Birds of New York - Eaton, Elon Howard, 1866 -1934 (University of the State of New York, 1914)

Birds of New York - Eaton, Elon Howard, 1866 -1934 (University of the State of New York, 1914)

Birds of New York - Eaton, Elon Howard, 1866 -1934 (University of the State of New York, 1914)

Birds of New York - Eaton, Elon Howard, 1866 -1934 (University of the State of New York, 1914)

Birds of New York - Eaton, Elon Howard, 1866 -1934 (University of the State of New York, 1914)

Birds of New York - Eaton, Elon Howard, 1866 -1934 (University of the State of New York, 1914)

Birds of New York - Eaton, Elon Howard, 1866 -1934 (University of the State of New York, 1914)

Birds of New York - Eaton, Elon Howard, 1866 -1934 (University of the State of New York, 1914)

Birds of New York - Eaton, Elon Howard, 1866 -1934 (University of the State of New York, 1914)

Birds of New York - Eaton, Elon Howard, 1866 -1934 (University of the State of New York, 1914)

The birds of North America : one hundred and nineteen artistic colored plates representing the different species and varieties drawn and colored from nature : including a copious text giving a popular account of their habits and characteristics, based on observations made in the field by the most eminent writers on ornithology : prefaced by a systematic table and index to page, plate and figure - Chapman, Frank M. (Frank Michler), 1864 -1945 (Published under the auspices of the Natural Science Association of America, 1903)

The birds of North America : one hundred and nineteen artistic colored plates representing the different species and varieties drawn and colored from nature : including a copious text giving a popular account of their habits and characteristics, based on observations made in the field by the most eminent writers on ornithology : prefaced by a systematic table and index to page, plate and figure - Chapman, Frank M. (Frank Michler), 1864 -1945 (Published under the auspices of the Natural Science Association of America, 1903)

The birds of North America; one hundred and nineteen artistic colored plates representing the different species and varieties, drawn and colored from nature. Including a copious text giving a popular account of their habits and characteristics, based on observations made in the field by the most eminent writers on ornithology. Prefaced by a systematic table and index to page, plate and figure. Arranged according to the classification adopted by the American Ornithologists' Union - Chapman, Frank M. (Frank Michler), 1864 -1945 (Published under the auspices of the Natural Science Association of America, 1895)

The birds of North America; one hundred and nineteen artistic colored plates representing the different species and varieties, drawn and colored from nature. Including a copious text giving a popular account of their habits and characteristics, based on observations made in the field by the most eminent writers on ornithology. Prefaced by a systematic table and index to page, plate and figure. Arranged according to the classification adopted by the American Ornithologists' Union - Chapman, Frank M. (Frank Michler), 1864 -1945 (Published under the auspices of the Natural Science Association of America, 1895)

The birds of North America : the descriptions of species based chiefly on the collections in the Museum of the Smithsonian Institution - Baird, Spencer Fullerton, 1823 -1887 (J.B. Lippincott & Co, 1860)

The birds of North America : the descriptions of species based chiefly on the collections in the Museum of the Smithsonian Institution - Baird, Spencer Fullerton, 1823 -1887 (J.B. Lippincott & Co, 1860)

The birds of North America : the descriptions of species based chiefly on the collections in the Museum of the Smithsonian Institution - Baird, Spencer Fullerton, 1823 -1887 (J.B. Lippincott & Co, 1860)

The birds of North America : the descriptions of species based chiefly on the collections in the Museum of the Smithsonian Institution - Baird, Spencer Fullerton, 1823 -1887 (J.B. Lippincott & Co, 1860)

The birds of North America : the descriptions of species based chiefly on the collections in the Museum of the Smithsonian Institution - Baird, Spencer Fullerton, 1823 -1887 (J.B. Lippincott & Co, 1860)

The birds of North America : the descriptions of species based chiefly on the collections in the Museum of the Smithsonian Institution - Baird, Spencer Fullerton, 1823 -1887 (J.B. Lippincott & Co, 1860)

The birds of North America : the descriptions of species based chiefly on the collections in the Museum of the Smithsonian Institution - Baird, Spencer Fullerton, 1823 -1887 (J.B. Lippincott & Co, 1860)

The birds of North America : the descriptions of species based chiefly on the collections in the Museum of the Smithsonian Institution - Baird, Spencer Fullerton, 1823 -1887 (J.B. Lippincott & Co, 1860)

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 - Ridgway, Robert, 1850 -1929 (Govt. Print. Off, 1901)

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 - Ridgway, Robert, 1850 -1929 (Govt. Print. Off, 1901)

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 - Ridgway, Robert, 1850 -1929 (Govt. Print. Off, 1901)

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 - Ridgway, Robert, 1850 -1929 (Govt. Print. Off, 1901)

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 - Ridgway, Robert, 1850 -1929 (Govt. Print. Off, 1901)

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 - Ridgway, Robert, 1850 -1929 (Govt. Print. Off, 1901)

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 - Ridgway, Robert, 1850 -1929 (Govt. Print. Off, 1901)

The birds of Ontario, being a list of birds observed in the province of Ontario, with an account of their habits, distribution, nests, eggs &c - McIlwraith, Thomas, 1824 -1903 (A. Lawson & co., printers, 1886)

The birds of Singapore Island - Kloss, C. Boden (Cecil Boden), 1877 -1949 (Printed at the Govt. Print. Office by W. T. Cherry, Govt. Printer, 1927)

The birds of South Africa - Sclater, William Lutley, 1863 -1944 (R. H. Porter, 1903)

The birds of South Africa - Sclater, William Lutley, 1863 -1944 (R. H. Porter, 1903)

The birds of South Africa - Sclater, William Lutley, 1863 -1944 (R. H. Porter, 1903)

The birds of South Africa - Sclater, William Lutley, 1863 -1944 (R. H. Porter, 1903)

The birds of St. Vincent - Clark, Austin Hobart, 1880 -1954 (1904)

The birds of the Connecticut valley in Massachusetts - Colburn, William W. (Clark W. Bryan, printer, 1891)

Birds of the Kansas City region - Harris, Harry, 1878 - (Academy of Sciences of St. Louis], 1919)

Birds of the Kansas City region - Harris, Harry, 1878 - (1919)

Birds of the Kansas City region - Harris, Harry, 1878 - (1919)

Birds of the Kelley-Roosevelts expedition to French Indo-China - Bangs, Outram, 1862 -1932 (1931)

Birds of the Marshall Field Peruvian Expedition, 1922-1923 - Zimmer, John T. (John Todd), 1889 -1957 (1930)