Query: Birds that are found only in Angola
Domain: animals
Relevant documents:
Ludwig's double-collared sunbird
Gabela akalat
Angolan slaty flycatcher
Swierstra's spurfowl
Grey-striped spurfowl
Red-crested turaco
Gabela bushshrike
Gabela helmetshrike
Pulitzer's longbill
Braun's bushshrike
Hartert's camaroptera
White-fronted wattle-eye