Cinereous Conebill 
Cinereous finch 
Cinereous ground tyrant 
Cinereous Tit 
Cinnamon attila 
Cinnamon becard 
Cinnamon bracken warbler 
Cinnamon flycatcher 
Cinnamon-breasted bunting 
Cinnamon-breasted tody-tyrant 
Cinnamon-faced tyrannulet 
Cinnamon-rumped foliage-gleaner 
Cinnamon-rumped seedeater 
Cinnamon-throated woodcreeper 
Cirl bunting 
Citrine wagtail 
Citrine warbler 
Citrine white-eye 
Citron-bellied Attila 
Clamorous reed warbler 
Clark's nutcracker 
Clay-colored thrush 
Cliff flycatcher 
Club-winged manakin