Noun | 1. | ![]() animal order - the order of animals Aves, class Aves - (ornithology) the class of birds anseriform bird - chiefly web-footed swimming birds Anatidae, family Anatidae - swimming birds having heavy short-legged bodies and bills with a horny tip: swans; geese; ducks Anseres, suborder Anseres - used in some especially older classifications; coextensive with the family Anatidae Anhimidae, family Anhimidae - screamers |