obscure honeyeater
Caligavis obscura, a honeyeater species found in New Guinea.

oceanites
plural of oceanite

ocellated crake
a bird from the family Rallidae, Micropygia schomburgkii.

ocellated turkey
An American turkey of species Meleagris ocellata.

ochraceous attila
A bird native to South America, Attila torridus

ochre-bellied boobook
A species of boobook owl, Ninox ochracea, endemic to Sulawesi and nearby islands in Indonesia.

odedi
Bougainville bush warbler (Horornis haddeni)

oilbird
A nocturnal South American bird, of the species Steatornis caripensis of the order Steatornithiformes, related to the nightjars that feeds on the fruit of the oil palm and tropical laurels.

oilbirds
plural of oilbird

oldsquaw
The long-tailed duck, a medium-sized seaduck: Clangula hyemalis.

oldsquaws
plural of oldsquaw

olive sparrow
Arremonops rufivirgatus, an American sparrow with an olive back.

olive sparrows
plural of olive sparrow

olive warbler
Any of the species Peucedramus taeniatus of small birds.

olive warblers
plural of olive warbler

olive-backed oriole
An olive and black passerine songbird, Oriolus sagittatus, of northern and eastern Australia and New Guinea.

olive-backed pipit
Anthus hodgsoni, passerine bird of the pipit (Anthus) genus, which breeds across southern, north central and eastern Asia, as well as in the north-eastern European Russia

olive-backed sunbird
Cinnyris jugularis, a bird of the sunbird family Nectariniidae

olive-backed thrush
Synonym of Swainson's thrush.

olive-sided flycatcher
a small to medium sized passerine bird in the family Tyrannidae, Contopus cooperi

olomao
Myadestes lanaiensis, a small, dark solitaire endemic to parts of the Hawaiian Islands.

olomaos
plural of olomao

omao
Myadestes obscurus, the Hawaiian thrush.

omnivoropteryx
Any primitive bird of the genus Omnivoropteryx.

oo
(Ω, ω) The Greek letter omega.

oofbirds
plural of oofbird

oos
plural of oo

orange-bellied parrot
Neophema chrysogaster, a species of grass parrot found in Australia.

orange-crowned warbler
A species of New World warbler, Leiothlypis celata, found in North America.

orange-footed scrubfowl
A species of megapode, Megapodius reinwardt, of Indonesia, New Guinea, and northern Australia.

orange-spotted bulbul
Pycnonotus bimaculatus, a species of perching bird.

orange-winged amazon
a species of parrot, Amazona amazonica.

orange-winged parrot
a species of parrot, Amazona amazonica

orangequit
A monotypic species of tanager (Euneornis campestris) endemic to Jamaica.

orangequits
plural of orangequit

oriental pratincole
A wader, Glareola maldivarum.

oriental turtle dove
A species of pigeon (Streptopelia orientalis).

oriole
Any of various colourful passerine birds, New World orioles of the genus Icterus (family Icteridae) and Old World orioles of the family Oriolidae.

orioles
plural of oriole

ornate hawk-eagle
Spizaetus ornatus, a large bird of prey that is native to Central and South America.

ornate tinamou
A tinamou, Nothoprocta ornata.

ornithoidichnites
plural of ornithoidichnite

ortolan bunting
Emberiza hortulana, a passerine bird in the bunting family Emberizidae.

ospray
Dated form of osprey.

osprays
plural of ospray

osprey
A bird of prey of genus Pandion that feeds on fish and has white underparts and long, narrow wings each ending in four finger-like extensions.
Aigrette (ornamental feather).

ospreys
plural of osprey

ossifraga
Alternative form of ossifrage.

ossifragas
plural of ossifraga

ostrich
A large flightless bird of the order Struthioniformes.
A large flightless bird of the order Struthioniformes.
The rhea.
One who buries their head in the sand instead of acknowledging problems.
The hypothetical completion of a hole five strokes under par (a quintuple birdie, quadruple eagle, triple albatross, or double condor).

ostriches
plural of ostrich

ostridge
Obsolete form of ostrich.

ostridges
plural of ostridge

ostrige
Obsolete form of ostrich.

ostriges
plural of ostrige

ou
A probably extinct species of Hawaiian honeycreeper, Psittirostra psittacea.

ouens
plural of ou

oule
Obsolete spelling of owl.

oules
plural of oule

ous
plural of ou

ovenbird
Any of several birds:
Any of several birds:
Any of several birds:

ovenbirds
plural of ovenbird

owl
Any of various birds of prey of the order Strigiformes, families Strigidae and Tytonidae, that are primarily nocturnal and have forward-looking, binocular vision, limited eye movement, and good hearing.
A person seen as having owl-like characteristics, especially appearing wise or serious, or being nocturnally active.
An owl pigeon.
A politician with moderate views that are neither hawkish nor dovish.
Any of various nymphalid butterflies, especially in the genus Caligo, having large eyespots on the wings.

owl parrot
The kakapo.

owleries
plural of owlery

owlery
An abode of owls.
A pen or enclosure for owls.

owlet-nightjar
Any of several species of small crepuscular birds comprising the order Aegotheliformes, of New Guinea, the Moluccas, and Australia.

owlet-nightjars
plural of owlet-nightjar

owls
plural of owl

oxbird
The dunlin.
The sanderling.
An African weaverbird (Bubalornis albirostris).

oxbirds
plural of oxbird

oxpeckers
plural of oxpecker

oxylabes
A white-throated oxylabes, of the sole species in genus Oxylabes, O. madagascariensis.

oystercatcher
Any of several black or pied coastal wading birds in the genus Haematopus that have a long red or orange bill and feed on shellfish.

oystercatchers
plural of oystercatcher

oystrige
Obsolete form of ostrich.

oystriges
plural of oystrige

paddyfield warbler
Acrocephalus agricola, a species of marsh warbler (family Acrocephalidae).

paint-billed crake
a bird from the family Rallidae (Neocrex erythrops).

paint-billed crakes
plural of paint-billed crake

painted berrypeckers
plural of painted berrypecker

painted bunting
A brightly-colored finch (Passerina ciris) of the southern United States
Smith's longspur (Calcarius pictus).

painted buttonquail
A species of buttonquail, Turnix varius, endemic to Australia,

painted finch
Emblema pictum, a common estrildid finch of Australia.

painted firetail
painted finch

painted francolin
Francolinus pictus, a francolin of the grasslands of India and Sri Lanka.

painted snipe
Any of three species of snipe-like birds in the family Rostratulidae, found in wetlands and characterised by reversed sexual dimorphism (female larger than male).

painted snipes
plural of painted snipe

painted-snipe
Alternative spelling of painted snipe.

palaeotropics
The tropics of "the old world", the tropical areas of both Africa and Asia. Used in biology (rare), pertaining to area of geographical occurrence.

pale thrush
A thrush (Turdus pallidus), of eastern Asia.

pale-browed tinamou
A tinamou, Crypturellus transfasciatus.

pale-faced antbird
Synonym of pale-faced bare-eye.

pale-faced bare-eye
Phlegopsis borbae, a species of antbird.

pale-footed bush warbler
Urosphena pallidipes, an Oriental warbler in the family Cettiidae, found in southern Asia.

pale-headed rosella
A broad-tailed, moderate-sized parrot of species Platycercus adscitus, native to northeastern Australia, with a pale yellow head, predominantly white cheeks, a scalloped black and gold back, pale blue underparts, and a blood-red vent.

paleotropics
Alternative form of palaeotropics.

palila
Loxioides bailleui, a finch-billed species of Hawaiian honeycreeper with a golden-yellow head and breast.

palilas
plural of palila

pallid cuckoo
The cuckoo Cacomantis pallidus, found mainly in Australia.

pallid harrier
Circus macrourus, a migratory bird of prey of the harrier family.

palm cockatoo
Probosciger aterrimus, a large smoky-grey or black parrot of the cockatoo family native to New Guinea and far north Queensland, Australia, with a large black beak and prominent red cheek patches.

palm dove
Synonym of laughing dove.

palmchat
Dulus dominicus, a small, long-tailed species of bird native to Hispaniola.