#avian morphology
- Anseriform — A palmiped bird of the order Anseriformes, structurally characterized by webbed feet adapted for swimming, a lamellate bill provided with marginal teeth for filtering food, and a dense plumage waterproofed by the secretions of the uropygial gland. As an adjective, the term defines any anatomical feature, skeletal structure, or behavioral particularity specific to this group of waterfowl, represented by geese, ducks, and swans.