All (in this database) Birds list (Scientific names): Part O

A AM AU B BR C CH CR D E F G H I J K L LU M MF N O P PF PU Q R S SI SU T TS U V W X Y Z

oahuensis (Bloxam, 1827) (Onychoprion fuscatus)
oatesi (Ogilvie-Grant, 1893) (Lophura leucomelanos)
oatesi Sharpe, 1896 (Garrulus glandarius)
oatesi Salvadori, 1887 (Niltava vivida)
oatesi Hume, 1873 (Hydrornis)
oatesi (Sharpe, 1903) (Chleuasicus atrosuperciliaris)
oatesi (Rippon, 1904) (Spelaeornis)
oaxacae Nelson, 1900 (Antrostomus arizonae)
oaxacae Nelson, 1897 (Dendrortyx macroura)
oaxacae (Nelson, 1897) (Eremophila alpestris)
oaxacae Pitelka, 1946 (Aphelocoma unicolor)
oaxacae (Brodkorb, 1942) (Thryophilus pleurostictus)
obbiensis Witherby, 1905 (Spizocorys)
oberholseri Stresemann, 1912 (Collocalia esculenta)
oberholseri Chasen, 1935 (Treron fulvicollis)
oberholseri Junge, 1936 (Eurystomus orientalis)
oberholseri Stresemann, 1913 (Hypothymis azurea)
oberholseri Dickey & Van Rossem, 1925 (Myadestes occidentalis)
oberholseri Phillips, 1939 (Empidonax)
oberholseri Moore, 1937 (Glaucidium palmarum)
oberi Lawrence, 1880 (Icterus)
oberi Ridgway, 1908 (Dysithamnus mentalis)
oberi Lawrence, 1877 (Myiarchus)
oberi (Kelso, 1936) (Pseudoscops clamator)
oberlaenderi (Sassi, 1914) (Zoothera)
oberon Schodde & Mason, 1991 (Psophodes leucogaster)
obfuscata Zimmer, 1942 (Ochthoeca rufipectoralis)
obidensis Todd, 1948 (Dendrocincla merula)
obidensis Todd, 1925 (Thripophaga fusciceps)
obidensis (Snethlage, 1914) (Thamnomanes ardesiacus)
obidensis Parkes & Humphrey, 1963 (Hemithraupis flavicollis)
obiensis (Hartert, 1903) (Accipiter hiogaster)
obiensis Sutter, 1955 (Turnix maculosus)
obiensis (Hartert, 1898) (Ducula basilica)
obiensis Salvadori, 1877 (Tanysiptera galatea)
obiensis (Salvadori, 1878) (Coracina tenuirostris)
obiensis (Hartert, 1912) (Eumyias panayensis)
obiensis Salvadori, 1878 (Pachycephala mentalis)
obiensis Bernstein, 1865 (Lycocorax pyrrhopterus)
obiensis (Hachisuka, 1935) (Erythropitta erythrogaster)
obiensis Salvadori, 1876 (Rhipidura rufiventris)
obiensis Rothschild, 1899 (Eos squamata)
obiensis (Finsch, 1868) (Geoffroyus geoffroyi)
obira Jany, 1955 (Otus magicus)
objurgans Deignan, 1942 (Prinia rufescens)
objurgatus (Baker, 1927) (Falco tinnunculus)
oblectans Deignan, 1952 (Garrulax sannio)
oblita (Mayr, 1941) (Cettia flavolivacea)
oblita Griscom, 1923 (Coereba flaveola)
oblitus (Mayr, 1938) (Prionochilus maculatus)
oblitus (Van Rossem, 1934) (Thryophilus pleurostictus)
oblitus (Bond, 1943) (Nephelomyias pulcher)
oblitus Hartert, 1929 (Zosterops ugiensis)
obrieni Short, 1973 (Celeus)
obscura Junge, 1956 (Aviceda subcristata)
obscura (Berlepsch & Stolzmann, 1902) (Coeligena coeligena)
obscura Snethlage, 1908 (Piaya cayana)
obscura Temminck, 1815 (Penelope)
obscura Todd, 1947 (Bonasa umbellus)
obscura Pelzeln, 1857 (Psophia viridis)
obscura Neumann, 1897 (Porzana pusilla)
obscura Delacour, 1931 (Nesillas typica)
obscura (Neumann, 1908) (Prinia melanops)
obscura Cory, 1913 (Coereba flaveola)
obscura Dickey & Van Rossem, 1923 (Aimophila ruficeps)
obscura Zimmer & Phelps, 1944 (Chamaeza campanisona)
obscura Chapman, 1914 (Synallaxis moesta)
obscura Berlepsch & Stolzmann, 1896 (Grallaria rufula)
obscura (Hartlaub, 1855) (Psalidoprocne)
obscura Nores & Yzurieta, 1979 (Sturnella loyca)
obscura Falla, 1948 (Anthornis melanura)
obscura (Gould, 1841) (Manorina flavigula)
obscura Gould, 1843 (Myzomela)
obscura (Berezowski & Bianchi, 1891) (Luscinia)
obscura (Jardine, 1842) (Cyanomitra olivacea)
obscura (Meyer, 1874) (Colluricincla megarhyncha)
obscura Cory, 1909 (Dendroica petechia)
obscura Ridgway, 1883 (Polioptila caerulea)
obscura (Hablizl, 1783) (Prunella modularis)
obscura Zarudny & Loudon, 1905 (Sitta tephronota)
obscura Zimmer, 1932 (Myrmotherula ignota)
obscura Zimmer & Phelps, 1946 (Schistocichla saturata)
obscura Phelps & Phelps, 1952 (Diglossa cyanea)
obscura Naumburg, 1924 (Thraupis sayaca)
obscura Baker, 1917 (Stachyridopsis rufifrons)
obscura (Orbigny & Lafresnaye, 1837) (Elaenia)
obscura Zimmer, 1939 (Inezia subflava)
obscura Zimmer & Phelps, 1946 (Pyrrhura egregia)
obscura Hume, 1872 (Ninox)
obscurata Fjeldsa & Kiure, 2003 (Xenoperdix)
obscurata (Hartert, 1907) (Chersomanes albofasciata)
obscurata Zimmer, 1932 (Myrmeciza atrothorax)
obscurata Mayr, 1942 (Stachyris leucotis)
obscuratus (Mayr, 1940) (Aegithalos bonvaloti)
obscuratus Cabanis, 1873 (Lochmias nematura)
obscuratus Stresemann, 1929 (Phylloscopus trochiloides)
obscuratus Chapman, 1927 (Picoides fumigatus)
obscuriceps Phelps & Phelps, 1953 (Thlypopsis fulviceps)
obscuriceps Zimmer, 1939 (Tolmomyias assimilis)
obscuriceps Zimmer & Phelps, 1947 (Brachygalba lugubris)
obscurifrons Junge, 1952 (Dicaeum geelvinkianum)
obscurior (Hume, 1874) (Gallirallus striatus)
obscurior Rothschild & Hartert, 1917 (Lalage leucomela)
obscurior Mayr, 1947 (Orthotomus cinereiceps)
obscurior Hartert, 1901 (Sclerurus mexicanus)
obscurior Todd, 1948 (Synallaxis macconnelli)
obscurior Buturlin, 1929 (Locustella naevia)
obscurior Mayr, 1935 (Monarcha castaneiventris)
obscurior Ogilvie-Grant, 1894 (Cinnyris jugularis)
obscurior Hartert, 1896 (Pachycephala schlegelii)
obscurior Deignan, 1948 (Malacocincla abbotti)
obscurior Todd, 1925 (Myiozetetes granadensis)
obscurior Todd, 1920 (Sublegatus)
obscurior Rothschild, 1921 (Yuhina occipitalis)
obscuripectus Zimmer & Phelps, 1945 (Mitrospingus oleagineus)
obscuritergum Zimmer & Phelps, 1946 (Leptopogon amaurocephalus)
obscurodorsalis Phelps & Phelps, 1948 (Roraimia adusta)
obscurodorsalis Phelps & Phelps, 1948 (Machetornis rixosa)
obscurostriatus Phelps & Gilliard, 1941 (Machaeropterus striolatus)
obscurum Ogilvie-Grant, 1894 (Dicaeum hypoleucum)
obscurus Gould, 1848 (Campylopterus largipennis)
obscurus Gmelin, 1789 (Charadrius)
obscurus Nelson, 1911 (Hylomanes momotula)
obscurus (Say, 1822) (Dendragapus)
obscurus (Verreaux, 1869) (Tetraophasis)
obscurus Prjevalsky, 1887 (Leptopoecile sophiae)
obscurus Ridgway, 1874 (Perisoreus canadensis)
obscurus(+) (Gmelin, 1788) (Hemignathus)
obscurus (Pelzeln, 1859) (Automolus rubiginosus)
obscurus (Gmelin, 1789) (Molothrus ater)
obscurus Nelson, 1900 (Quiscalus mexicanus)
obscurus Delacour & Jabouille, 1930 (Garrulax merulinus)
obscurus (De Vis, 1897) (Lichenostomus)
obscurus Rand, 1940 (Rhagologus leucostigma)
obscurus (Prazak, 1894) (Cyanistes caeruleus)
obscurus Zimmer, 1931 (Ramphocaenus melanurus)
obscurus Todd, 1927 (Hylophylax naevius)
obscurus Zimmer, 1933 (Taraba major)
obscurus Zimmer, 1933 (Thamnophilus amazonicus)
obscurus (Orbigny & Lafresnaye, 1837) (Tiaris)
obscurus Hume, 1872 (Pomatorhinus horsfieldii)
obscurus Zimmer & Phelps, 1946 (Microcerculus ustulatus)
obscurus (Zimmer & Phelps, 1947) (Pheugopedius coraya)
obscurus (Gmelin, 1789) (Myadestes)
obscurus Gmelin, 1789 (Turdus)
obscurus (Dickey & Van Rossem, 1925) (Mionectes oleagineus)
obscurus (Zimmer, 1940) (Poecilotriccus plumbeiceps)
obscurus Gould, 1839 (Pyrocephalus rubinus)
obscurus Bonaparte, 1855 (Nycticorax nycticorax)
obscurus (La Touche, 1921) (Dendrocopos canicapillus)
obscurus (Phelps & Phelps, 1953) (Megascops albogularis)
observandus (Hartert, 1896) (Picus puniceus)
obsoleta Zimmer, 1950 (Chlorestes notata)
obsoleta (Zimmer, 1924) (Metriopelia ceciliae)
obsoleta (Lichtenstein, 1823) (Rhodospiza)
obsoleta (Reichenbach, 1853) (Cranioleuca)
obsoleta Chubb, 1916 (Grallaria nuchalis)
obsoleta (Cabanis, 1850) (Ptyonoprogne)
obsoletum (Muller, 1843) (Dicaeum agile)
obsoletum (Temminck, 1824) (Camptostoma)
obsoletus (Richmond, 1902) (Accipiter butleri)
obsoletus Ridgway, 1874 (Rallus longirostris)
obsoletus Zimmer, 1924 (Xenops minutus)
obsoletus Todd, 1917 (Xiphocolaptes promeropirhynchus)
obsoletus (Lichtenstein, 1820) (Xiphorhynchus)
obsoletus (Say, 1822) (Salpinctes)
obsoletus Lawrence, 1862 (Turdus)
obsoletus (Ribeiro, 1905) (Hemitriccus)
obsoletus (Wagler, 1829) (Dendropicos)
obsoletus Allen, 1892 (Picumnus squamulatus)
obsoletus (Cabanis, 1875) (Otus brucei)
obsoletus (Temminck, 1815) (Crypturellus)
obstinatus Hartert, 1900 (Zosterops montanus)
obtusa (Chapin, 1922) (Vidua)
ocai (Lawrence, 1865) (Pipilo)
occabambae (Chapman, 1923) (Grallaria rufula)
occasa Ripley, 1957 (Gerygone magnirostris)
occidens Lynes, 1930 (Cisticola eximius)
occidentale (Ridgway, 1882) (Toxostoma curvirostre)
occidentalis Salvin, 1876 (Leucopternis)
occidentalis (Baird, 1858) (Branta canadensis)
occidentalis Berlepsch & Taczanowski, 1884 (Chaetura cinereiventris)
occidentalis (Cabanis, 1872) (Charadrius nivosus)
occidentalis Audubon, 1839 (Larus)
occidentalis (Stolzmann, 1926) (Patagioenas cayennensis)
occidentalis Schodde, 1989 (Phaps elegans)
occidentalis Gould, 1870 (Dacelo leachii)
occidentalis Neumann, 1908 (Centropus monachus)
occidentalis (Gould, 1844) (Falco berigora)
occidentalis Delacour, 1948 (Lophura nycthemera)
occidentalis Bonaparte, 1850 (Smicrornis brevirostris)
occidentalis (Hartlaub, 1857) (Mirafra africana)
occidentalis Ridgway, 1882 (Certhia americana)
occidentalis Chubb, 1918 (Conopophaga aurita)
occidentalis Ticehurst, 1925 (Dendrocitta formosae)
occidentalis (Chapman, 1914) (Pipreola riefferii)
occidentalis Chapman, 1914 (Pyroderus scutatus)
occidentalis Hellmayr, 1911 (Arremon aurantiirostris)
occidentalis Jardine, 1852 (Estrilda astrild)
occidentalis Todd, 1927 (Grallaricula nana)
occidentalis Berlepsch & Stolzmann, 1892 (Molothrus bonariensis)
occidentalis (Hartert, 1909) (Garrulax rufogularis)
occidentalis Cabanis, 1851 (Lichenostomus cratitius)
occidentalis Junge, 1939 (Melidectes fuscus)
occidentalis Rand, 1940 (Ptiloprora meekiana)
occidentalis Mayr, 1931 (Myiagra caledonica)
occidentalis (Townsend, 1837) (Dendroica)
occidentalis Brewster, 1883 (Geothlypis trichas)
occidentalis Rand, 1940 (Amalocichla sclateriana)
occidentalis Rothschild & Hartert, 1903 (Microeca griseoceps)
occidentalis (Hartert, 1910) (Prunella modularis)
occidentalis (Mathews, 1912) (Psophodes)
occidentalis Sharpe, 1882 (Chlorocichla flaviventris)
occidentalis (Chapman, 1923) (Dysithamnus)
occidentalis Zimmer, 1932 (Hypocnemoides melanopogon)
occidentalis Cherrie, 1891 (Myrmeciza exsul)
occidentalis Sclater, 1860 (Oryzoborus maximiliani)
occidentalis Carriker, 1932 (Sicalis citrina)
occidentalis Chapman, 1914 (Tangara arthus)
occidentalis (Sclater, 1855) (Tersina viridis)
occidentalis Robinson & Kloss, 1923 (Pomatorhinus montanus)
occidentalis (Sclater, 1860) (Onychorhynchus)
occidentalis Sclater, 1859 (Catharus)
occidentalis Stejneger, 1882 (Myadestes)
occidentalis Nelson, 1897 (Empidonax)
occidentalis Zimmer, 1937 (Myiozetetes granadensis)
occidentalis Delacour, 1931 (Schetba rufa)
occidentalis Harington, 1913 (Pteruthius xanthochlorus)
occidentalis Audubon, 1835 (Ardea herodias)
occidentalis (Huey, 1927) (Egretta tricolor)
occidentalis Linnaeus, 1766 (Pelecanus)
occidentalis Chapman, 1914 (Eubucco bourcierii)
occidentalis (Hargitt, 1889) (Celeus torquatus)
occidentalis Chapman, 1915 (Andigena nigrirostris)
occidentalis (Lawrence, 1858) (Aechmophorus)
occidentalis (Gould, 1861) (Pezoporus)
occidentalis (Salvadori, 1876) (Psittaculirostris desmarestii)
occidentalis (Xantus de Vesey, 1860) (Strix)
occidentalis (Salvadori, 1895) (Crypturellus cinnamomeus)
occidentalis Pinto, 1950 (Trogon melanurus)
occidentis White, 1938 (Talegalla fuscirostris)
occidentis Clancey, 1968 (Pinarocorys nigricans)
occiduus Bangs, 1911 (Rupornis magnirostris)
occipitalis (Daudin, 1800) (Lophaetus)
occipitalis (Burchell, 1824) (Trigonoceps)
occipitalis (Salvadori, 1893) (Phapitreron leucotis)
occipitalis Gray, 1844 (Ptilinopus)
occipitalis Blyth, 1846 (Todiramphus chloris)
occipitalis (Muller, 1836) (Dendrocitta)
occipitalis (Blyth, 1846) (Urocissa erythroryncha)
occipitalis (Salvin, 1878) (Melozone leucotis)
occipitalis (Du Bus de Gisignies, 1847) (Chlorophonia)
occipitalis Madarasz, 1903 (Synallaxis albescens)
occipitalis (Blyth, 1845) (Phylloscopus)
occipitalis Zimmer, 1932 (Pygiptila stellaris)
occipitalis Ridgway, 1887 (Muscisaxicola rufivertex)
occipitalis Hodgson, 1836 (Yuhina)
occipitalis Garnot, 1826 (Podiceps)
occisinensis Martens, Sun & Packert, 2008 (Phylloscopus)
occularis Bourns & Worcester, 1894 (Rhinomyias ruficauda)
occulta (Zimmer, 1936) (Dixiphia pipra)
occulta Lawson, 1984 (Batis poensis)
occulta Imber,MJ & Tennyson, 2001 (Pterodroma)
occultum Moore, 1947 (Glaucidium griseiceps)
occultus Zimmer, 1949 (Basileuterus culicivorus)
oceanica (Lesson & Garnot, 1826) (Ducula)
oceanica Pucheran, 1853 (Myiagra)
oceanicus (Kuhl, 1820) (Oceanites)
Oceanites Keyserling & Blasius, 1840 (Hydrobatidae)
Oceanodroma Reichenbach, 1853 (Hydrobatidae)
ocellata Gould, 1840 (Leipoa)
ocellata Cuvier, 1820 (Meleagris)
ocellata (Elliot, 1871) (Rheinardia)
ocellata (Bonaparte, 1850) (Ninox boobook)
ocellata (Lesson, 1839) (Strix)
ocellatum (Sclater, 1862) (Toxostoma)
ocellatus (Tschudi, 1844) (Nyctiphrynus)
ocellatus Quoy & Gaimard, 1830 (Podargus)
ocellatus (Scopoli, 1786) (Turnix)
ocellatus (Gould, 1837) (Cyrtonyx)
ocellatus (Raffles, 1822) (Caloperdix oculeus)
ocellatus (Spix, 1824) (Xiphorhynchus)
ocellatus (Vigors, 1831) (Garrulax)
Ochetorhynchus Meyen, 1834 (Furnariidae)
ochotensis (Middendorff, 1853) (Locustella)
ochoterena Van Rossem, 1934 (Claravis mondetoura)
ochra Deignan, 1948 (Aethopyga saturata)
ochracea Rothschild & Hartert, 1901 (Syma torotoro)
ochracea Brewster, 1882 (Spizella arborea)
ochracea Zimmer, 1936 (Synallaxis azarae)
ochracea Hodgson, 1837 (Sasia)
ochracea (Schlegel, 1866) (Ninox)
ochraceiceps Walden, 1873 (Pomatorhinus)
ochraceiceps Sclater, 1860 (Hylophilus)
ochraceicrista Chapman, 1921 (Basileuterus fraseri)
ochraceifrons Graves, O'Neill & Parker, 1983 (Grallaricula)
ochraceiventer Snethlage, 1928 (Thamnophilus caerulescens)
ochraceiventris Hellmayr, 1907 (Phaethornis malaris)
ochraceiventris Chapman, 1914 (Leptotila)
ochraceiventris Berlepsch, 1912 (Saltator similis)
ochraceiventris Nelson, 1898 (Grallaria guatimalensis)
ochraceiventris Chapman, 1922 (Grallaricula flavirostris)
ochraceiventris Chapman, 1921 (Hypocnemis hypoxantha)
ochraceiventris (Cabanis, 1873) (Nephelomyias)
ochraceiventris (Stolzmann, 1926) (Crypturellus obsoletus)
ochraceus (Cory, 1915) (Falco sparverius)
ochraceus Rothschild, 1893 (Loxops coccineus)
ochraceus (Moore, 1854) (Alophoixus)
ochraceus (Berlepsch, 1912) (Hylophylax naevius)
ochraceus (Berlepsch & Taczanowski, 1884) (Hemispingus)
ochraceus Ridgway, 1882 (Troglodytes)
ochraceus Sclater & Salvin, 1869 (Contopus)
ochraceus Salvin, 1863 (Vireo pallens)
ochraceus (Spix, 1824) (Celeus flavescens)
ochrascens Hellmayr, 1904 (Sporophila collaris)
ochrocephala (Gmelin, 1789) (Mohoua)
ochrocephala Tschudi, 1845 (Cyclarhis gujanensis)
ochrocephala (Gmelin, 1788) (Amazona)
ochrochrous Schodde & Mason, 1999 (Zosterops lateralis)
ochrogaster (Reichenow, 1903) (Ceyx azureus)
ochrogaster Pelzeln, 1870 (Penelope)
ochrogaster Schodde & Mason, 1999 (Smicrornis brevirostris)
ochrogaster Salvadori, 1897 (Estrilda)
ochrogaster Hellmayr, 1917 (Philydor erythrocercum)
ochrogaster Zimmer, 1935 (Synallaxis unirufa)
ochrogenys (Hume, 1873) (Strix leptogrammica)
ochrogularis (Moreau, 1941) (Phylloscopus ruficapilla)
ochrogyna Snethlage, 1928 (Cercomacra nigrescens)
ochrogyna Zimmer, 1932 (Hypocnemis)
ochrogyna Todd, 1927 (Myrmotherula longipennis)
ochrogyne (Olson, 1981) (Oryzoborus funereus)
ochrolaemus (Tschudi, 1844) (Automolus)
ochrolaemus (Hellmayr, 1906) (Myrmoborus myotherinus)
ochroleuca Olrog, 1959 (Pseudoseisura gutturalis)
ochroleucus (Wied-Neuwied, 1831) (Hylopezus)
ochromalus Raffles, 1822 (Eurylaimus)
ochromelas (Meyer, 1874) (Melidectes)
ochropectus (Dorst & Jouanin, 1952) (Pternistis)
ochroptera Pelzeln, 1857 (Psophia leucoptera)
ochropterus (Allen, 1889) (Poecilotriccus latirostris)
ochropus Linnaeus, 1758 (Tringa)
ochropyga (Hellmayr, 1906) (Drymophila)
ochruros (Gmelin, 1774) (Phoenicurus)
Ochthoeca Cabanis, 1847 (Tyrannidae)
Ochthornis Sclater, 1888 (Tyrannidae)
ocistus (Oberholser, 1906) (Aerodramus)
ockendeni Hellmayr, 1906 (Turdus fuscater)
ocreata (Strickland, 1844) (Fraseria)
Ocreatus Gould, 1846 (Trochilidae)
octaviae Amadon, 1953 (Cyanomitra cyanolaema)
octogenarii Diamond, 1985 (Pachycephala soror)
octosetaceus Vieillot, 1817 (Mergus)
ocularis Verreaux, 1833 (Glareola)
ocularis Mayr, 1931 (Ptilinopus solomonensis)
ocularis (Reichenow, 1900) (Merops pusillus)
ocularis (Gould, 1838) (Lichmera indistincta)
ocularis Swinhoe, 1860 (Motacilla alba)
ocularis Smith, 1828 (Ploceus)
ocularis (Radde, 1884) (Prunella)
ocularis Mayr, 1931 (Rhipidura drownei)
ocularis Nelson, 1912 (Chrysothlypis chrysomelas)
ocularis Sclater, 1859 (Phrygilus plebejus)
ocularis (Sclater, 1865) (Aratinga pertinax)
ocularius (Smith, 1843) (Malcorus pectoralis)
oculata (Quoy & Gaimard, 1830) (Stagonopleura)
oculeus (Temminck, 1815) (Caloperdix)
oculeus (Hartlaub, 1855) (Canirallus)
Oculocincta Mees, 1953 (Zosteropidae)
Ocyalus Waterhouse, 1841 (Icteridae)
Ocyceros Hume, 1873 (Bucerotidae)
ocypetes Zimmer, 1953 (Chaetura brachyura)
Ocyphaps Gray, 1842 (Columbidae)
odica Clancey, 1962 (Thamnolaea cinnamomeiventris)
odicus Bangs & Phillips, 1914 (Pomatorhinus gravivox)
odicus (Wetmore, 1959) (Cantorchilus nigricapillus)
odiosa Sclater, 1877 (Ninox)
odites (Peters, 1945) (Todiramphus australasia)
odomae Graves, 1980 (Metallura)
Odontophoridae (Galliformes)
Odontophorus Vieillot, 1816 (Odontophoridae)
Odontorchilus Richmond, 1915 (Troglodytidae)
Odontospiza Oberholser, 1905 (Estrildidae)
oecotonophilus Borrero & Hernandez-Camacho, 1958 (Thamnophilus multistriatus)
oedicnemus (Linnaeus, 1758) (Burhinus)
Oedistoma Salvadori, 1876 (Melanocharitidae)
Oena Swainson, 1837 (Columbidae)
Oenanthe Vieillot, 1816 (Muscicapidae)
oenanthe (Linnaeus, 1758) (Oenanthe)
oenanthoides (Orbigny & Lafresnaye, 1837) (Ochthoeca)
oenas Linnaeus, 1758 (Columba)
oeneicaudus Verreaux & Verreaux, 1855 (Phaenicophaeus curvirostris)
oenochlamys (Sharpe, 1877) (Sitta)
oenone (Lesson, 1832) (Chrysuronia)
oenops (Salvin, 1895) (Patagioenas)
oenops (Sclater,PL & Salvin, 1880) (Laterallus melanophaius)
oenothorax (Salvadori, 1892) (Ducula aenea)
ofella Buden, 1986 (Loxigilla violacea)
ogawae Hartert, 1907 (Hypsipetes amaurotis)
ogawae (Hartert, 1910) (Nannus troglodytes)
ogilviegranti (Chubb, 1917) (Patagioenas subvinacea)
ogilviegranti (Bannerman, 1922) (Pternistis bicalcaratus)
ogilviegranti (La Touche, 1922) (Phylloscopus)
oglei (Godwin-Austen, 1877) (Stachyris)
ogliastrae (Hartert, 1905) (Cyanistes caeruleus)
Ognorhynchus Bonaparte, 1857 (Psittacidae)
ogoensis (Mackworth-Praed, 1920) (Pternistis castaneicollis)
okadai Momiyama, 1928 (Lagopus lagopus)
okavangensis Roberts, 1932 (Dryoscopus cubla)
okavangoensis Payne, 1973 (Vidua chalybeata)
okinavensis Phillips, 1947 (Turnix suscitator)
okinawae (Yamashina & Mano, 1981) (Gallirallus)
okinawae Hartert, 1905 (Parus minor)
okuensis Serle, 1949 (Phoeniculus bollei)
okyri Schodde & Mason, 1999 (Myiagra rubecula)
olallae (Gyldenstolpe, 1945) (Campephilus rubricollis)
olallai Coopmans & Krabbe, 2000 (Myiopagis)
olax (Temminck, 1823) (Treron)
oldeani Sclater & Moreau, 1935 (Turdus abyssinicus)
oleacea (Griscom, 1932) (Carduelis notata)
oleaginea (Sclater, 1884) (Syndactyla rufosuperciliata)
oleaginea Neumann, 1904 (Psalidoprocne pristoptera)
oleagineus (Sclater, 1883) (Psarocolius angustifrons)
oleagineus (Salvin, 1886) (Mitrospingus)
oleagineus (Lichtenstein, 1823) (Mionectes)
oleagineus Hartlaub & Finsch, 1872 (Zosterops)
oleagineus (Reichenbach, 1854) (Picoides fumigatus)
oleaginus Peters, 1868 (Andropadus importunus)
olimotiensis Elliott, 1945 (Pinarochroa sordida)
olivacea (Delacour & Jabouille, 1928) (Arborophila chloropus)
olivacea (Meyen, 1834) (Amaurornis)
olivacea (Vieillot, 1819) (Porzana albicollis)
olivacea (Gould, 1838) (Gerygone)
olivacea Tschudi, 1844 (Chamaeza campanisona)
olivacea (Berlepsch & Stolzmann, 1894) (Carduelis)
olivacea Phelps & Phelps, 1956 (Syndactyla subalaris)
olivacea Mayr, 1938 (Lichmera alboauricularis)
olivacea (Smith, 1840) (Cyanomitra)
olivacea Vigors & Horsfield, 1827 (Pachycephala)
olivacea Oort, 1910 (Paramythia montium)
olivacea Styan, 1896 (Alcippe brunnea)
olivacea (Strickland, 1847) (Malacocincla abbotti)
olivacea Blyth, 1844 (Iole)
olivacea Gould, 1837 (Certhidea)
olivacea (Cassin, 1860) (Chlorothraupis)
olivacea (Gmelin, 1789) (Piranga)
olivacea (Ridgway, 1906) (Schiffornis turdina)
olivacea (Du Bus de Gisignies, 1838) (Bostrychia)
olivacea (Shelley, 1880) (Stactolaema)
olivaceiceps (Sharpe, 1873) (Coua ruficeps)
olivaceiceps Underwood, 1898 (Chlorospingus canigularis)
olivaceiceps (Reichenow, 1899) (Ploceus)
olivaceiceps (Shelley, 1896) (Arizelocichla)
olivaceiceps (Berlepsch, 1912) (Anisognathus lacrymosus)
olivaceofuscus Hartlaub, 1852 (Turdus)
olivaceogriseus Reichenow, 1908 (Phyllastrephus flavostriatus)
olivaceum (Lawrence, 1864) (Chalcostigma)
olivaceum Walden, 1875 (Dicaeum minullum)
olivaceum Jerdon, 1839 (Pellorneum ruficeps)
olivaceum (Berlepsch, 1889) (Camptostoma obsoletum)
olivaceum (Lawrence, 1862) (Oncostoma)
olivaceum Chapman, 1939 (Glaucidium brasilianum)
olivaceus Tweeddale, 1877 (Prionochilus)
olivaceus Zimmer, 1931 (Formicarius analis)
olivaceus (Fraser, 1843) (Linurgus)
olivaceus Griscom, 1927 (Campylorhamphus pusillus)
olivaceus Zimmer, 1934 (Dendrocolaptes picumnus)
olivaceus Wied-Neuwied, 1831 (Sittasomus griseicapillus)
olivaceus Aveledo & Pons, 1952 (Xenops minutus)
olivaceus (Shaw, 1809) (Chlorophoneus)
olivaceus (Hume, 1877) (Rhinomyias)
olivaceus (Kuroda, 1923) (Poecile varius)
olivaceus (Moseley, 1891) (Phylloscopus)
olivaceus (Hahn, 1820) (Ploceus capensis)
olivaceus (Latham, 1802) (Psophodes)
olivaceus (Swainson, 1837) (Criniger)
olivaceus Jardine & Selby, 1837 (Hypsipetes)
olivaceus Baird, 1864 (Regulus satrapa)
olivaceus Rothschild, 1923 (Cephalopyrus flammiceps)
olivaceus (Tschudi, 1844) (Dysithamnus mentalis)
olivaceus (Linnaeus, 1766) (Tiaris)
olivaceus Blyth, 1847 (Pomatorhinus schisticeps)
olivaceus Linnaeus, 1766 (Turdus)
olivaceus Lawrence, 1868 (Mionectes)
olivaceus Berlepsch & Stolzmann, 1894 (Mitrephanes)
olivaceus (Phelps & Phelps, 1953) (Myiotheretes fumigatus)
olivaceus (Temminck, 1820) (Rhynchocyclus)
olivaceus Tschudi, 1844 (Hylophilus)
olivaceus (Linnaeus, 1766) (Vireo)
olivaceus (Linnaeus, 1766) (Zosterops)
olivaceus (Gmelin, 1788) (Geocolaptes)
olivaceus Lafresnaye, 1845 (Picumnus)
olivacina (Peters, 1881) (Cyanomitra olivacea)
olivaresi Stiles, 1996 (Chlorostilbon)
olivaresi Hernandez-Camacho & Romero-Zambrano, 1978 (Momotus subrufescens)
olivascens Chubb, 1918 (Neocrex erythrops)
olivascens Cabanis, 1848 (Saltator coerulescens)
olivascens (Clancey, 1969) (Calamonastes stierlingi)
olivascens Zimmer, 1934 (Dendrocincla merula)
olivascens Cabanis, 1873 (Sclerurus caudacutus)
olivascens Hellmayr, 1917 (Grallaricula nana)
olivascens (Cassin, 1859) (Muscicapa)
olivascens Chapman, 1893 (Basileuterus culicivorus)
olivascens (Ridgway, 1891) (Gymnopithys leucaspis)
olivascens Orbigny, 1839 (Embernagra platensis)
olivascens (Orbigny& Lafresnaye, 1837) (Sicalis)
olivascens Sharpe, 1882 (Cinnycerthia)
olivascens Nelson, 1899 (Catharus occidentalis)
olivascens (Todd, 1915) (Hemitriccus flammulatus)
olivascens Ridgway, 1884 (Myiarchus tuberculifer)
olivascens (Hartert, 1909) (Pterocles exustus)
olivascens Conover, 1937 (Tinamus major)
olivascentior Hartert, 1930 (Amalocichla incerta)
olivater (Lafresnaye, 1848) (Turdus)
olivea (McClelland, 1840) (Tesia)
oliveri Mathews, 1930 (Phalacrocorax punctatus)
olivetorum (Strickland, 1837) (Hippolais)
oliviae Clarke, 1918 (Columba)
olivicyanea (Lafresnaye, 1843) (Thraupis cyanocephala)
olivieri (Grandidier,G & Berlioz, 1929) (Amaurornis)
olivii Robinson, 1900 (Turnix)
olivina (Sclater, 1865) (Schistochlamys melanopis)
olivina Salvin & Godman, 1884 (Elaenia pallatangae)
olivinus Sassi, 1912 (Cercococcyx)
olivinus (Natterer & Malherbe, 1845) (Veniliornis passerinus)
olmecorum Dickerman, 1981 (Euphonia affinis)
olor (Gmelin, 1789) (Cygnus)
olrogi Amadon, 1964 (Micrastur ruficollis)
olrogi Nores & Yzurieta, 1979 (Cinclodes)
olympicus Madarasz, 1903 (Cinclus cinclus)
omalurus Blyth, 1851 (Cisticola juncidis)
ombriosa (Rothschild & Hartert, 1905) (Coracina lineata)
ombriosa Hartert, 1913 (Fringilla coelebs)
ombriosus (Meade-Waldo, 1890) (Cyanistes teneriffae)
omeiensis Cheng, Chang & Tang, 1964 (Lophura nycthemera)
omeiensis Riley, 1926 (Liocichla)
omeiensis Martens, Eck, Packert & Sun, 1999 (Seicercus)
omeiensis Riley, 1930 (Yuhina gularis)
omiltemensis Nelson, 1903 (Xiphocolaptes promeropirhynchus)
omiltemensis Ridgway, 1905 (Catharus frantzii)
omissa Zimmer, 1948 (Coeligena torquata)
omissa Rothschild, 1921 (Emberiza godlewskii)
omissa Hartert, 1913 (Euphonia fulvicrissa)
omissa Hartert, 1901 (Synallaxis rutilans)
omissa Rothschild, 1912 (Foudia)
omissa Todd, 1927 (Myrmotherula menetriesii)
omissus Pinto, 1933 (Campylorhamphus trochilirostris)
omissus (Hartert, 1896) (Cyornis)
omissus Jardine, 1847 (Tiaris bicolor)
omissus (Rothschild, 1922) (Dendrocopos canicapillus)
omissus Dementiev, 1933 (Bubo bubo)
omo Neumann & Lynes, 1928 (Cisticola robustus)
omoensis Neumann, 1928 (Mirafra rufocinnamomea)
omoensis Neumann, 1905 (Emberiza affinis)
omoensis (Neumann, 1903) (Turdoides leucopygia)
omoensis Neumann, 1906 (Anthus leucophrys)
omoensis (Neumann, 1904) (Cercomela familiaris)
omoensis Sharpe, 1900 (Cossypha albicapillus)
omoensis (Neumann, 1905) (Phylloscopus umbrovirens)
omoensis Neumann, 1904 (Zosterops abyssinicus)
Oncostoma Sclater, 1862 (Tyrannidae)
oneho Bartle & Sagar, 1987 (Anthornis melanura)
oneilli Lowery & Tallman, 1976 (Nephelornis)
onerosa Hartert, 1899 (Gerygone magnirostris)
onguati Macdonald, 1957 (Streptopelia capicola)
onocrotalus Linnaeus, 1758 (Pelecanus)
onslowi (Forbes, 1893) (Leucocarbo)
Onychognathus Hartlaub, 1849 (Sturnidae)
Onychoprion Wagler, 1832 (Laridae)
Onychorhynchus Fischer von Waldheim, 1810 (Tityridae)
Onychostruthus Richmond, 1917 (Passeridae)
oorti Rothschild & Hartert, 1913 (Sericornis nouhuysi)
oorti Rothschild & Hartert, 1907 (Clytomyias insignis)
oorti (Muller, 1836) (Megalaima)
opaca (Cabanis, 1850) (Iduna)
opaca (Kittlitz, 1833) (Aplonis)
opaca (Peters, 1943) (Strix albitarsis)
opacus Zimmer, 1941 (Scytalopus)
opertaneus Wetmore, 1955 (Catharus fuscater)
ophryophanes (Salvadori, 1895) (Falco rufigularis)
ophthalmica (Sclater, 1860) (Sporophila corvina)
ophthalmica Sclater, 1864 (Cacatua)
ophthalmicus (Du Bus de Gisignies, 1847) (Chlorospingus)
ophthalmicus Taczanowski, 1874 (Pogonotriccus)
opistherythra Sclater, 1883 (Rhipidura)
Opisthocomidae Swainson, 1837 (Opisthocomiformes)
Opisthocomiformes (Aves)
Opisthocomus Illiger, 1811 (Opisthocomidae)
opisthocyanea Oberholser, 1911 (Hypothymis azurea)
opisthomelas Coues, 1864 (Puffinus)
Opisthoprora Cabanis & Heine, 1860 (Trochilidae)
Oporornis Baird, 1858 (Parulidae)
oppenheimi Neumann, 1915 (Sturnus vulgaris)
optata Hartlaub, 1866 (Pachycephala graeffii)
optatus Gould, 1845 (Cuculus)
opthalmicus Castelnau & Ramsay, 1877 (Haematopus fuliginosus)
opuntia Burleigh & Lowery, 1939 (Amphispiza bilineata)
orangensis Roberts, 1937 (Crithagra albogularis)
oraria Parkes & Dickerman, 1967 (Dendroica petechia)
oratrix Ridgway, 1887 (Amazona)
orbignyianus Geoffroy Saint-Hilaire & Lesson, 1831 (Thinocorus)
orbitalis (Wahlberg, 1854) (Sylvia conspicillata)
orbitalis (Cabanis, 1873) (Pogonotriccus)
orbitatus (Wied-Neuwied, 1831) (Hemitriccus)
orbygnesius (Souance, 1856) (Bolborhynchus)
orcesi Ridgely & Robbins, 1988 (Pyrrhura)
Orchesticus Cabanis, 1851 (Thraupidae)
ordii (Cassin, 1851) (Notharchus)
oreas Wetmore, 1950 (Geotrygon goldmani)
oreas Reichenow, 1899 (Picathartes)
oreas (Sclater & Salvin, 1869) (Lessonia)
oregonus Bell, 1849 (Pipilo maculatus)
oreinus Behle & Selander, 1951 (Dendragapus obscurus)
orenocensis Hellmayr, 1921 (Thalurania furcata)
orenocensis Lafresnaye, 1846 (Saltator)
orenocensis (Lafresnaye, 1846) (Pyroderus scutatus)
orenocensis Zimmer, 1935 (Certhiaxis cinnamomeus)
orenocensis Berlepsch & Hartert, 1902 (Xiphocolaptes promeropirhynchus)
orenocensis Hellmayr, 1904 (Formicivora intermedia)
orenocensis Berlepsch, 1884 (Knipolegus)
orenocensis Berlepsch & Hartert, 1902 (Veniliornis affinis)
oreobates Brooke, 1970 (Apus barbatus)
oreobates (Sharpe, 1892) (Merops)
oreobates Irwin, 1966 (Cisticola lais)
oreobates Scott, 1900 (Cinclodes albidiventris)
oreobates Clancey, 1956 (Saxicola torquatus)
Oreocharis Salvadori, 1876 (Paramythiidae)
Oreoica Gould, 1838 (Pachycephalidae)
Oreolais Nguembock, Fjeldsa, Couloux, Cruaud & Pasquet, 2008 (Cisticolidae)
Oreomanes Sclater, 1860 (Thraupidae)
Oreomystis Stejneger, 1903 (Fringillidae)
Oreonympha Gould, 1869 (Trochilidae)
Oreophasis Gray, 1844 (Cracidae)
oreophila Sharpe, 1888 (Cettia vulcania)
oreophila (Oberholser, 1900) (Oenanthe deserti)
oreophila Todd, 1913 (Catamenia homochroa)
Oreophilais Clancey, 1991 (Cisticolidae)
oreophilus Hartert & Neumann, 1914 (Buteo)
oreophilus Hartert, 1925 (Cacomantis variolosus)
oreophilus Someren, 1922 (Cisticola tinniens)
oreophilus Mayr, 1931 (Zosterops novaeguineae)
Oreopholus Jardine & Selby, 1835 (Charadriidae)
oreopola Todd, 1913 (Metallura tyrianthina)
oreopsar Lowther, 2001 (Agelaioides)
Oreopsittacus Salvadori, 1877 (Psittacidae)
Oreornis Oort, 1910 (Meliphagidae)
Oreortyx Baird, 1858 (Odontophoridae)
Oreoscoptes Baird, 1858 (Mimidae)
Oreoscopus North, 1905 (Acanthizidae)
Oreostruthus De Vis, 1898 (Estrildidae)
Oreothlypis Ridgway, 1884 (Parulidae)
Oreothraupis Sclater, 1856 (Thraupidae)
Oreotrochilus Gould, 1847 (Trochilidae)
oresbia Wetmore, 1962 (Tangara icterocephala)
oreskios (Temminck, 1823) (Harpactes)
oressinoma Olson, 1981 (Euphonia xanthogaster)
orestera Wetmore, 1951 (Zonotrichia capensis)
orestera (Oberholser, 1905) (Leiothlypis celata)
oreum Deignan, 1947 (Pellorneum ruficeps)
oriantha Oberholser, 1932 (Zonotrichia leucophrys)
oriens Clancey, 1957 (Erythropygia paena)
orientale (Delacour & Jabouille, 1930) (Cinclidium frontale)
orientale Taczanowski, 1891 (Glaucidium passerinum)
orientalis Cabanis, 1854 (Aquila nipalensis)
orientalis (Temminck & Schlegel, 1844) (Nisaetus nipalensis)
orientalis Taczanowski, 1891 (Pernis ptilorhynchus)
orientalis Gould, 1845 (Mergus merganser)
orientalis (Mayr, 1935) (Aerodramus)
orientalis Brehm, 1831 (Numenius arquata)
orientalis Rand, 1941 (Gallicolumba rufigula)
orientalis Hartert, 1896 (Macropygia ruficeps)
orientalis (Latham, 1790) (Streptopelia)
orientalis Peters, 1868 (Halcyon albiventris)
orientalis (Linnaeus, 1766) (Eurystomus)
orientalis Latham, 1802 (Merops)
orientalis (Linnaeus, 1766) (Eudynamys)
orientalis (Horsfield, 1821) (Arborophila)
orientalis Davison, 1974 (Lophophorus sclateri)
orientalis Horsfield, 1821 (Gallinula chloropus)
orientalis (Temminck & Schlegel, 1847) (Acrocephalus)
orientalis Zarudny & Loudon, 1904 (Ammomanes deserti)
orientalis Sushkin, 1925 (Calandrella brachydactyla)
orientalis Tristram, 1867 (Cettia cetti)
orientalis Delacour, 1931 (Neomixis tenella)
orientalis Eversmann, 1841 (Corvus corone)
orientalis (Shelley, 1882) (Emberiza cabanisi)
orientalis (Lorenz von Liburnau & Hellmayr, 1901) (Euodice cantans)
orientalis Mayr, 1938 (Corydon sumatranus)
orientalis Zimmer, 1935 (Pseudocolaptes boissonneautii)
orientalis Reichenow, 1889 (Psalidoprocne pristoptera)
orientalis (Robinson & Kloss, 1919) (Minla cyanouroptera)
orientalis (Jerdon, 1845) (Turdoides striata)
orientalis (Sharpe, 1883) (Melocichla mentalis)
orientalis (Cabanis, 1869) (Tchagra senegalus)
orientalis Mayr, 1931 (Melanocharis longicauda)
orientalis (Meyer, 1894) (Meliphaga)
orientalis Mayr, 1933 (Mayrornis lessoni)
orientalis (Reichenow & Neumann, 1895) (Myioparus plumbeus)
orientalis (Fischer & Reichenow, 1884) (Pogonocichla stellata)
orientalis Hartlaub, 1880 (Anthreptes)
orientalis Zarudny & Loudon, 1905 (Cyanistes caeruleus)
orientalis Chapman, 1924 (Basileuterus coronatus)
orientalis (Brehm, 1855) (Phylloscopus)
orientalis (Heuglin, 1870) (Batis)
orientalis Gould, 1879 (Chlamydera nuchalis)
orientalis (Hartlaub, 1883) (Phyllastrephus scandens)
orientalis (Schlegel, 1871) (Mino anais)
orientalis Gyldenstolpe, 1941 (Hypocnemoides maculicauda)
orientalis Delacour, 1927 (Pomatorhinus ferruginosus)
orientalis Robinson, 1918 (Stachyris thoracica)
orientalis Heuglin, 1870 (Vidua)
orientalis Todd, 1916 (Vireo gundlachii)
orientalis Chapman, 1914 (Eubucco bourcierii)
orientalis (Robinson, 1915) (Megalaima australis)
orientalis Meyer, 1891 (Geoffroyus geoffroyi)
orientalis (Linnaeus, 1758) (Pterocles)
orientalis Severtzov, 1873 (Athene noctua)
orientalis Delacour, 1926 (Ketupa zeylonensis)
orienticola Todd, 1942 (Amazilia brevirostris)
orienticola Oberholser, 1920 (Electron platyrhynchum)
orienticola Todd, 1932 (Penelope jacquacu)
orientis Deignan, 1948 (Tephrodornis pondicerianus)
origenis (Oberholser, 1906) (Aerodramus whiteheadi)
Origma Gould, 1838 (Acanthizidae)
orii Yamashina, 1932 (Streptopelia orientalis)
orii (Taka-Tsukasa & Momiyama, 1931) (Todiramphus chloris)
orii Kuroda, 1923 (Garrulus glandarius)
orii (Kuroda, 1923) (Poecile varius)
orii Kuroda, 1923 (Pycnonotus sinensis)
orii Taka-Tsukasa & Yamashina, 1931 (Aplonis opaca)
orii (Kuroda, 1923) (Dendrocopos kizuki)
orina Wetmore, 1953 (Coeligena)
orinocensis Zimmer & Phelps, 1945 (Tachyphonus cristatus)
orinocensis Friedmann, 1942 (Thlypopsis sordida)
orinocensis Zimmer & Phelps, 1955 (Turdus fumigatus)
orinocensis Zimmer & Phelps, 1946 (Leptopogon amaurocephalus)
orinocensis Zimmer, 1941 (Sublegatus arenarum)
orinocensis Zimmer & Phelps, 1950 (Picumnus spilogaster)
orinoma (Oberholser, 1906) (Anas cyanoptera)
orinomus Wetmore, 1946 (Cnemarchus erythropygius)
orinus Oberholser, 1905 (Acrocephalus)
Oriolia Geoffroy Saint-Hilaire, 1838 (Vangidae)
Oriolidae Vigors, 1825 (Passeriformes)
oriolinus Bates, 1909 (Lobotos)
orioloides Pucheran, 1853 (Pachycephala)
Oriolus Linnaeus, 1766 (Oriolidae)
oriolus (Linnaeus, 1758) (Oriolus)
oriomo Mayr & Rand, 1936 (Coracina papuensis)
orissae (Jerdon, 1845) (Turdoides striata)
orissae Ripley, 1955 (Rhipidura albicollis)
oritis (Reichenow, 1892) (Cyanomitra)
Oriturus Bonaparte, 1850 (Emberizidae)
orius (Oberholser, 1911) (Picoides villosus)
orix (Linnaeus, 1758) (Euplectes)
ornata (Wagler, 1829) (Urocissa)
ornata Shulpin, 1928 (Emberiza aureola)
ornata Mayr, 1932 (Pachycephala vitiensis)
ornata (Sclater, 1853) (Epinecrophylla)
ornata Nelson, 1912 (Hemithraupis flavicollis)
ornata (Landbeck, 1865) (Poospiza)
ornata (Sclater, 1859) (Thlypopsis)
ornata (Sparrman, 1789) (Thraupis)
ornata Mayr, 1940 (Charmosyna placentis)
ornata (Gray, 1867) (Nothoprocta)
ornatus (Daudin, 1800) (Spizaetus)
ornatus (Boddaert, 1783) (Lophornis)
ornatus Gould, 1861 (Orthorhyncus cristatus)
ornatus Schlegel, 1871 (Ptilinopus)
ornatus (Mayr, 1931) (Todiramphus chloris)
ornatus Latham, 1802 (Merops)
ornatus (Townsend, 1837) (Calcarius)
ornatus Geoffroy Saint-Hilaire, 1809 (Cephalopterus)
ornatus Zimmer, 1934 (Xiphorhynchus elegans)
ornatus (Gould, 1838) (Lichenostomus)
ornatus Lesson, 1827 (Cinnyris jugularis)
ornatus Temminck, 1826 (Pardalotus striatus)
ornatus (Boissonneau, 1840) (Myioborus)
ornatus (Daudin, 1800) (Lamprotornis)
ornatus Cherrie, 1891 (Pachyramphus albogriseus)
ornatus (Lafresnaye, 1853) (Myiotriccus)
ornatus (Linnaeus, 1758) (Trichoglossus)
Ornithion Hartlaub, 1853 (Tyrannidae)
orosae Chapman, 1928 (Capito auratus)
orostruthus (Vincent, 1933) (Arcanator)
oroyae (Chapman, 1924) (Haplochelidon andecola)
orpheana (Clancey, 1954) (Sylvia subcaerulea)
orpheus Jardine, 1849 (Pachycephala)
orphnum Wetmore, 1957 (Camptostoma obsoletum)
orphogaster Reichenow, 1899 (Cinnyris chloropygius)
orquillensis (Cory, 1909) (Quiscalus lugubris)
orrhophaeus (Cabanis & Heine, 1863) (Harpactes)
orru Bonaparte, 1850 (Corvus)
Ortalis Merrem, 1786 (Cracidae)
Orthogonys Strickland, 1844 (Thraupidae)
Orthonychidae Gray, 1840 (Passeriformes)
Orthonyx Temminck, 1820 (Orthonychidae)
orthonyx (Lafresnaye, 1843) (Acropternis)
Orthopsittaca Ridgway, 1912 (Psittacidae)
Orthorhyncus Lacepede, 1799 (Trochilidae)
Orthotomus Horsfield, 1821 (Cisticolidae)
ortizi Zimmer, 1952 (Incaspiza)
ortleppi (Tristram, 1869) (Prinia flavicans)
ortoni Salvin, 1874 (Penelope)
Ortygospiza Sundevall, 1850 (Estrildidae)
Ortyxelos Vieillot, 1825 (Turnicidae)
oryzivora (Linnaeus, 1758) (Lonchura)
oryzivorus (Linnaeus, 1758) (Dolichonyx)
oryzivorus (Gmelin, 1788) (Molothrus)
Oryzoborus Cabanis, 1851 (Thraupidae)
osai Ogawa, 1905 (Corvus macrorhynchos)
osberti Gould, 1860 (Chlorostilbon canivetii)
osburni (Sclater, 1861) (Vireo)
osceola Scott, 1890 (Meleagris gallopavo)
oscillans (Hartert, 1897) (Rhinomyias)
oscitans (Boddaert, 1783) (Anastomus)
osculans (Gould, 1871) (Coeligena violifer)
osculans Swinhoe, 1871 (Haematopus ostralegus)
osculans (Gould, 1847) (Chrysococcyx)
osea Bonaparte, 1856 (Cinnyris)
oseryi (Deville, 1849) (Clypicterus)
osgoodi Cory, 1913 (Momotus subrufescens)
osgoodi (Bishop, 1900) (Falcipennis canadensis)
osgoodi Blake, 1941 (Aulacorhynchus derbianus)
osgoodi Conover, 1949 (Tinamus)
oshiroi Kuroda,Nagahisa, 1971 (Buteo japonicus)
osiris (Finsch, 1870) (Cinnyris mariquensis)
osmastoni (Baker, 1934) (Pelargopsis capensis)
osmastoni (Hartert, 1908) (Cettia pallidipes)
ostenta Ripley, 1952 (Coracina)
ostjakorum Sushkin & Stegmann, 1929 (Perisoreus infaustus)
ostralegus Linnaeus, 1758 (Haematopus)
ostrinus (Vieillot, 1805) (Pyrenestes)
otero (Tschudi, 1844) (Heliodoxa leadbeateri)
Otididae (Otidiformes)
Otidiformes (Aves)
Otidiphaps Gould, 1870 (Columbidae)
otiosus Bangs, 1911 (Antrostomus rufus)
otiosus (Richmond, 1902) (Dicrurus paradiseus)
Otis Linnaeus, 1758 (Otididae)
otofuscus Moore, 1935 (Ptilogonys cinereus)
otomitra (Reichenow, 1904) (Zoothera gurneyi)
ottolanderi Robinson, 1918 (Pomatorhinus montanus)
ottomeyeri Stresemann, 1933 (Lalage leucomela)
ottomeyeri Stresemann, 1933 (Pachycephala citreogaster)
ottonis Hartert, 1904 (Ptilinopus cinctus)
ottonis (Berlepsch, 1901) (Asthenes)
ottonis Berlepsch, 1901 (Pogonotriccus ophthalmicus)
ottowi Hoy, 1968 (Geositta rufipennis)
otus (Linnaeus, 1758) (Asio)
Otus Pennant, 1769 (Strigidae)
oustaleti Roselaar, 1994 (Megapodius freycinet)
oustaleti Scott, 1900 (Cinclodes)
oustaleti (Hartert, 1909) (Trochalopteron affine)
oustaleti (Bocage, 1878) (Cinnyris)
oustaleti (Sclater, 1887) (Phylloscartes)
oustaleti Berlepsch & Stolzmann, 1901 (Nothoprocta pentlandii)
ovamboensis Neumann, 1920 (Erythropygia leucophrys)
ovamboensis Reichenow, 1904 (Cinnyris mariquensis)
ovampensis Gurney, 1875 (Accipiter)
ovandensis (Brodkorb, 1939) (Lampornis viridipallens)
ovandensis Brodkorb, 1938 (Catharus dryas)
owenii Gould, 1847 (Apteryx)
owstoni (Rothschild, 1904) (Todiramphus chloris)
owstoni (Rothschild, 1895) (Gallirallus)
owstoni Ingram, 1910 (Nucifraga caryocatactes)
owstoni Rothschild & Hartert, 1907 (Pyrrhula erythaca)
owstoni (Rothschild, 1903) (Garrulax canorus)
owstoni (Bangs, 1901) (Ficedula narcissina)
owstoni Rothschild, 1910 (Aethopyga siparaja)
owstoni (Ijima, 1893) (Poecile varius)
owstoni Hartert, 1900 (Zosterops semperi)
owstoni (Ogawa, 1905) (Dendrocopos leucotos)
oxycerca (Spix, 1825) (Cercibis)
Oxylabes Sharpe, 1870 (Bernieridae)
Oxypogon Gould, 1848 (Trochilidae)
oxyptera Meyen, 1834 (Anas flavirostris)
Oxyruncus Temminck, 1820 (Tityridae)
Oxyura Bonaparte, 1828 (Anatidae)
oxyurus (Temminck, 1823) (Treron)

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