This medium-sized goose has two color morphs, formerly considered separate species: white and blue. All have pink bills with black “lipstick,” and pink legs and feet. The white morph is mostly white, with black wingtips. The blue morph is mostly grayish-brown overall, with a white head and neck, and white on the underside of the wing. Intermediate forms occur, and immatures look different from adults. The calls are loud and nasal.