80 ELEMENTS OF ORNITHOLOGY. 
comes from Western Africa, and the whole group, consisting as 
it does of about twenty-five species, is entirely confined to that 

ah 
Le oo . 
x SS a \ y 
aN 

The White-backed Coly (Colius capensis). 
Continent, where they feed on fruit, frequenting the loftiest 
trees. On the head is an elegant crest. of feathers, which they 
can elevate or depress. Almost all of them have a beautiful 
