- American dipper
Cinclus mexicanus
- brown dipper
Cinclus pallasii
- rufous-throated dipper
Cinclus schulzi
- greater double-collared sunbird
Cinnyris afer
- purple sunbird
Cinnyris asiaticus
- olive-bellied sunbird
Cinnyris chloropygius
- olive-backed sunbird
Cinnyris jugularis
- northern harrier
Circus cyaneus
- common green magpie
Cissa chinensis
- golden-headed cisticola
Cisticola exilis
- fan-tailed cisticola;zitting cisticola
Cisticola juncidis
- marsh wren
Cistothorus palustris
- lilac-cheeked kingfisher
Cittura cyanotis
- great spotted cuckoo
Clamator glandarius
- long-tailed duck
Clangula hyemalis