Anatomy: The Cockatoo averages about 12 to 15 inches (31-38 cm) long. These parrots range in color from white, pink, yellow, gray, and black; they all have a large, feathery head crest, and a curved bill. Males sometimes have darker feathers or eyes than females; otherwise, males and females are hard to distinguish.

Reproduction: There are only a few eggs in each clutch (a set of eggs laid in one nesting period). The eggs are laid in a hollow tree cavity. Both parents incubate the eggs for close to a month, and both parents feed the chicks.

Diet: Cockatoos eat seeds of grasses, berries, and nuts.

Classification: Order Psittaciformes, Family Cacatuidae, Genus Cacatua.