WHISTLING n.
The European whooper swan; -- called also wild swan, and elk. (b) An American swan (Olor columbianus). See under Swan. -- Whistling teal (Zoöl.), a tree duck, as Dendrocygna awsuree of India. -- Whistling thrush. (Zoöl.) (a) Any one of several species of singing birds of the genus Myiophonus, native of Asia, Austral…