Grzimek Birds
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- South American painted-snipe
Nycticryphes semicollaris
- South American painted-snipe
- blue-bearded bee-eater
Nyctyornis athertoni
- blue-bearded bee-eater
- cockatiel
Nymphicus hollandicus
- cockatiel
- white-eared puffbird
Nystalus chacuru
- white-eared puffbird
- Wilson's storm petrel
Oceanites oceanicus
- Wilson's storm petrel
- Leach's storm petrel
Oceanodroma leucorhoa
- Leach's storm petrel
- northern wheatear
Oenanthe oenanthe
- northern wheatear
- capped wheatear
Oenanthe pileata
- capped wheatear
- red-winged starling
Onychognathus morio
- red-winged starling
- hoatzin
Opisthocomus hoazin
- hoatzin
- crested bellbird
Oreoica gutturalis
- crested bellbird
- horned guan
Oreophasis derbianus
- horned guan
- origma
Origma solitaria
- origma
- black-and-crimson oriole
Oriolus cruentus
- black-and-crimson oriole
- African black-headed oriole
Oriolus larvatus
- African black-headed oriole