Adult emperor geese are small waterfowl averaging less than 3 kg and around 69 cm in length. They are sexually monomorphic with males averaging only slightly heavier than females. Emperor geese exhibit an entirely white head and nape of neck that often becomes stained a rust color by iron oxide present in a number of tidal ponds. Chin and throat are black with the rest of the body covered in gray plumage barred with black and white. Their beaks are short and light pink while their webbed feet are a bright orange. Tail feathers are white with black undertail coverts. Anser canagicus goslings are covered in downy gray feathers and usually have a black beak. ("Emperor Goose", 2010)

 

Other Physical Features: Endothermic; Homoiothermic; Bilateral symmetry

Sexual Dimorphism: Sexes alike; Male larger