List of Birds Starting With Letter “O”
- oilbird
- openbill
- oriole
- oropendola
- osprey
- ostrich
- ouzel
- ovenbird
- owl
- owlet
- oxpecker
- oystercatcher
- Olive pigeon
- Olive thrush
- Olive whistler
- Olive-brown thrush
- Olive-faced lovebird
- Olive-flanked whistler
- Olive-green bush-hen
- Olive-green parrot
- Olive-green tanager
- Olive-greenshank
- Olive-headed flycatcher
- Olive-sided flycatcher
- Olive-tailed thrush
- Olive-throated parakeet
- Olive-winged bulbul
- Orange-bellied antbird
- Orange-bellied fruit-dove
- Orange-billed bushshrike
- Orange-billed hummingbird
- Orange-billed sparrow
- Orange-billed trogon
- Orange-breasted bushshrike
- Orange-breasted fruit-dove
- Orange-breasted sunbird
- Orange-chinned parakeet
- Orange-crowned fairywren
- Orange-crowned monarch
- Orange-crowned rosefinch
- Orange-footed scrubfowl
- Orange-fronted barbet
- Orange-headed thrush
- Orange-throated tanager
- Orange-tufted jungle-flycatcher
- Orange-winged amazon
- Orange-winged parrot
- Oriental bay-owl
- Oriental cuckoo
- Oriental dwarf kingfisher
- Oriental fruiteater
- Oriental pied-hornbill
- Oriental plover
- Oriental reed warbler
- Oriental scops owl
- Oriental scops-owl
- Oriental turtle-dove
- Oriole
