Query: Birds found in South China and Vietnam, but not in Yunnan
Domain: animals
Relevant documents:
Pied falconet
Kloss's leaf warbler
Yellow-billed nuthatch
Fork-tailed sunbird
Greyish-crowned leafbird
Russet bush warbler
Hodgson's hawk-cuckoo
Blue-rumped pitta
White-bellied green pigeon
Ratchet-tailed treepie
Cook's swift
Spectacled barwing
White-eared night heron
Rufous-capped babbler
Crested kingfisher
Grey-headed parrotbill
White-shouldered starling
Indochinese green magpie
Streak-breasted scimitar babbler