THE FAUNISTIC IMPORTANCE OF THE SCARP OF ANGOLA

Abstract

1The geographical features, in particular the western escarpment, and the climate and vegetation of western Angola combine to divide the area into three avifaunal zones.2An unusual relationship exists between some related forms of different zones. This is illustrated by two groups of examples in which the characters of the forms are summarised, their distribution is shown on maps, and an attempt is made to interpret in evolutionary terms the picture presented.3Endemic or near‐endemic forms of the Escarpment Zone are listed with some notes on their affinities with other species.4The botanical history of the area is discussed in relation to the conclusions reached on the evolution of the birds.5The Escarpment Zone of Angola has been of considerable importance in the evolution of species in western Africa, south of the Equator.