Croon are large bulky beasts, vaguely bird-like, but with fine, short integument rather than feathers. They spend their days in small to large herds in swamps and bogs, feeding on various sorts of vegetation. They are known for their crooning cries, which become more intense in the late summer, when they rut. Docile, but skittish. In some species, the crooning call seems to come from the crest like extrusion crowing the head. They have vaguely duck-like bills.
