The Blue Duck (Hymenolaimus malacorhynchos) is a member of the duck, goose and swan family Anatidae. It is the only member of the genus Hymenolaimus, placed in the shelduck subfamily Tadorninae after previously being considered part of the paraphyletic "perching duck" assemblage. The Māori name is whio, which is an onomatopoetic rendition of the males' call. The blue duck is born with a green beak for just 8 hours after birth; where it then develops to...
