The range of biomes and ecosystems in Angola has resulted in a rich avifauna of c.912 species, of which c.800 species breed or are assumed to breed in the country (Dean 2000). There are relatively few endemic bird species compared to the southern African subregion (13 versus 166 species; Clancey 1986), but these are characterized by small distribution ranges, mostly in a few sites on the escarpment of western Angola. The endemic species in Angola are also among the poorest known of the avifauna. Breeding data, for example (including records of young out of the nest and juveniles), are available for only five of the endemic species, and for only two endemic species are the eggs and nest known.