Annual report - New York State Museum. (University of the State of New York, 1914)

Annual report of the Board of Regents of the Smithsonian Institution - Smithsonian Institution (Smithsonian Institution, 1885)

Annual report of the Board of Regents of the Smithsonian Institution - Smithsonian Institution (Smithsonian Institution, 1890)

Annual report of the Board of Regents of the Smithsonian Institution - Smithsonian Institution (Smithsonian Institution, 1897)

Annual report of the Board of Regents of the Smithsonian Institution - Smithsonian Institution (Smithsonian Institution, 1901)

Annual report of the Board of Regents of the Smithsonian Institution - Smithsonian Institution (Smithsonian Institution, 1941)

Annual report of the Board of Regents of the Smithsonian Institution - Smithsonian Institution (Smithsonian Institution, 1944)

Annual report of the Commissioner of Fisheries to the Secretary of Commerce for the fiscal year ended - United States. Bureau of Fisheries. (G.P.O, 1920)

Annual report of the Ohio State Academy of Science - Ohio Academy of Science. (The Academy, 1901)

Annual report of the Secretary of the State Board of Agriculture of the State of Michigan - Michigan State College. Agricultural Experiment Station. (The Board, 1862)

Appendix to A list of the genera of birds - Gray, George Robert, 1808 -1872 (Richard and John E. Taylor, 1842)

Aquila - Magyar ornithologiai központ. (A Magyar Ornithologiai Knt Kiadva, 1897)

Aquila - Magyar ornithologiai központ. (A Magyar Ornithologiai Knt Kiadva, 1901)

Aquila - Magyar ornithologiai központ. (A Magyar Ornithologiai Knt Kiadva, 1920)

Aquilegia - Colorado Native Plant Society. (Colorado Native Plant Society, 2020)

Arboretum et fruticetum britannicum, or : The trees and shrubs of Britain, native and foreign, hardy and half-hardy, pictorially and botanically delineated, and scientifically and popularly described ... - Loudon, J. C. (John Claudius), 1783 -1843 (J.C. Loudon, 1844)

Arboretum et fruticetum britannicum; or, The trees and shrubs of Britain, native and foreign, hardy and half-hardy, pictorially and botanically delineated, and scientifically and popularly described; with their propagation, culture, management, and uses in the arts, in useful and ornamental plantations, and in landscape-gardening; preceded by a historical and geographical outline of the trees and shrubs of temperate climates throughout the world - Loudon, J. C. (John Claudius), 1783 -1843 (Henry G. Bohn, 1854)

Archiv des Vereins der Freunde der Naturgeschichte in Mecklenburg... - Verein der Freunde der Naturgeschichte in Mecklenburg. (Opitz and Company, 1847)

Archiv des Vereins der Freunde der Naturgeschichte in Mecklenburg... - Verein der Freunde der Naturgeschichte in Mecklenburg. (Opitz and Company, 1877)

Archiv des Vereins der Freunde der Naturgeschichte in Mecklenburg... - Verein der Freunde der Naturgeschichte in Mecklenburg. (Opitz and Company, 1861)

Archiv für Naturgeschichte Abteilung B (Nicolai, 1913)

Archiv für Naturgeschichte Abteilung B (Nicolai, 1917)

Archiv für Naturgeschichte (Nicolai, 1837)

Archiv für Naturgeschichte (Nicolai, 1839)

Archiv für Naturgeschichte (Nicolai, 1844)

Archiv für Naturgeschichte (Nicolai, 1845)

Archiv für Naturgeschichte (Nicolai, 1885)

Archiv für Naturgeschichte (Nicolai, 1888)

Archiv für Naturgeschichte (Nicolai, 1897)

Archiv für Naturgeschichte (Nicolai, 1901)

Archiv für Naturgeschichte (Nicolai, 1909)

Archiv für Naturgeschichte (Nicolai, 1910)

Archives des missions scientifiques et littéraires - France. Commission des missions scientifiques et littéraires. (Imprimerie nationale, 1889)

Archivos do Museu Nacional do Rio de Janeiro - Museu Nacional (Brazil) ([Cysneiros & Cia, 1905)

Archivos do Museu Nacional do Rio de Janeiro - Museu Nacional (Brazil) ([Cysneiros & Cia, 1907)

Archivos do Museu Nacional do Rio de Janeiro - Museu Nacional (Brazil) ([Cysneiros & Cia, 1923)

Ardea - Nederlandsche Ornithologische Vereeniging. (Nederlandse Ornithlogische Unie, etc, 1921)

Argentina and Paraguay, specimen lists, 1920 - Wetmore, Alexander, 1886 -1978 (1920)

Aristotelis De animalibus historiae libri X : Graece et Latine - Schneider, Johann Gottlob, 1750 -1822 (In bibliopolio Hahniano, 1811)

Arkiv för zoologi - Kungl. Svenska vetenskapsakademien. (P.A. Norstedt & soner, 1922)

Arsberattelse om Nyare Zoologiska Arbeten och Upptackter till Kongl. Vetenskaps-Acadamien (1826)

The Auk - American Ornithologists' Union. (American Ornithologists' Union, etc, 1884)

The Auk - American Ornithologists' Union. (American Ornithologists' Union, etc, 1886)

The Auk - American Ornithologists' Union. (American Ornithologists' Union, etc, 1887)

The Auk - American Ornithologists' Union. (American Ornithologists' Union, etc, 1888)

The Auk - American Ornithologists' Union. (American Ornithologists' Union, etc, 1889)

The Auk - American Ornithologists' Union. (American Ornithologists' Union, etc, 1890)

The Auk - American Ornithologists' Union. (American Ornithologists' Union, etc, 1891)

The Auk - American Ornithologists' Union. (American Ornithologists' Union, etc, 1892)

The Auk - American Ornithologists' Union. (American Ornithologists' Union, etc, 1893)

The Auk - American Ornithologists' Union. (American Ornithologists' Union, etc, 1897)

The Auk - American Ornithologists' Union. (American Ornithologists' Union, etc, 1899)

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

The Auk - American Ornithologists' Union. (American Ornithologists' Union, etc, 1904)

The Auk - American Ornithologists' Union. (American Ornithologists' Union, etc, 1906)

The Auk - American Ornithologists' Union. (American Ornithologists' Union, etc, 1908)

The Auk - American Ornithologists' Union. (American Ornithologists' Union, etc, 1909)

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

The Auk - American Ornithologists' Union. (American Ornithologists' Union, etc, 1912)

The Auk - American Ornithologists' Union. (American Ornithologists' Union, etc, 1913)

The Auk - American Ornithologists' Union. (American Ornithologists' Union, etc, 1916)

The Auk - American Ornithologists' Union. (American Ornithologists' Union, etc, 1919)

The Auk - American Ornithologists' Union. (American Ornithologists' Union, etc, 1920)

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)

Aves Hungariae : enumeratio systematica avium Hungariæ cum notis brevibus biologicis, locis inventionis virorumque a quibus oriuntur - Frivaldszky, János, 1822 -1895 (Typis Societatis Frankli, 1891)

The Avicultural magazine - Avicultural Society. (Avicultural Society, etc, 1912)

The Avicultural magazine - Avicultural Society. (Avicultural Society, etc, 1920)

The Avicultural magazine - Avicultural Society. (Avicultural Society, etc, 1922)

The Avicultural magazine - Avicultural Society. (Avicultural Society, etc, 1929)

The Avicultural magazine - Avicultural Society. (Avicultural Society, etc, 1931)

The Avicultural magazine - Avicultural Society. (Avicultural Society, etc, 1938)

The Avicultural magazine - Avicultural Society. (Avicultural Society, etc, 1947)

The Avicultural magazine - Avicultural Society. (Avicultural Society, etc, 1952)

The Avicultural magazine - Avicultural Society. (Avicultural Society, etc, 1971)

The Avicultural magazine - Avicultural Society. (Avicultural Society, etc, 1977)

Avifauna italica. Elenco delle specie di uccelli stazionarie o di passaggio in Italia, colla loro sinonimia volgare e con notizie più specialmente intorno alle migrazioni ed alla nidificazione - Giglioli, Enrico Hillyer, 1845 -1909 (Coi tipi dei successori Le Monnier, 1886)