Malacorhynchus is a genus of duck within the family Anatidae. It was established in 1831 by English ornithologist William John Swainson, when he proposed moving the pink-eared duck into a subgenus (Malacorhynchus) based on unique characters of its beak and toes. The genus contains one living and one extinct species. List of species Pink-eared duck (M. membranaceus) †Scarlett's duck (M. scarletti) – extinct References Ducks Anatinae Bird genera Bird genera with one living species