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Ocreatus underwoodii (14)	Ocyphaps lophotes (4)	Odontophorus melanonotus (8)	Oena capensis (21)
Oenanthe bifasciata (1)	Oenanthe deserti (5)	Oenanthe familiaris (3)	Oenanthe lugens (2)
Oenanthe lugubris schalowi (1)	Oenanthe monticola (1)	Oenanthe oenanthe (12)	Oenanthe pileata (11)
Onychognathus morio (8)	Onychognathus nabouroup (2)	Onychognathus tristramii (3)	Onychoprion anaethetus (4)
Onychoprion fuscatus (15)	Onychorhynchus coronatus (2)	Onychorhynchus swainsoni (1)	Ophisthocomus hoazin (1)
Oreophasis derbianus (3)	Oreophylax moreirae (1)	Oreortyx pictus (17)	Oreortyx pictus eremophila (1)
Oreortyx pictus pictus (2)	Oreoscoptes montanus (20)	Oreothlypis celata (33)	Oreothlypis luciae (1)
Oreothlypis peregrina (2)	Oreothlypis ruficapilla (5)	Oriolus larvatus (7)	Oriolus xanthornus (3)

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