Birds are vertebrates, with a backbone and skeleton, although some of the bones are hollow to keep the bird light and aloft. Their forelimbs have the same bones as the human arm, but they are highly modified to form the structure for wings. Some of the bones in the wrist and fingers are fused together for extra strength.
Buffalo weavers nest in open, loose colonies. The nest is built high in a tree in a fork of branches. It is a large, rather untidy structure of twigs and coarse grasses, the short tubular entrance being on the bottom.
There are 17 species of storks, all with stout bodies, long slender legs and slightly webbed short toes. Their claws are blunt and nail-like. Like birds of prey, young storks have two successive coats of down.
The crowned pigeons, belonging to the family Gourinae, are large blue-gray birds with deep maroon below. These birds begin the morning with a chorus of calls before the flock sets out to feed and drink.
During the day frogmouths sleep perched lengthwise on a branch with their heads up and their eyes closed. Their color so matches the branch that they look like part of it and are almost impossible to see.
The flight call is a shrill disyllabic screech, repeated a number of times in rapid succession. They are also known to have a thin, high pitched wheezy note, and while perched they may emit typical chuckling sounds.