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Genus Tachyeres
Falkland Steamerduck - The Falkland Steamer Duck's wings are very short , and it is incapable of flight. The plumage of the Falkland Steamer Duck is mostly dark grey, but with a white stripe behind the eye. It is very difficult to distinguish from the Flying Steamer Duck in the field since they occupy the same habitat and, although the Flying Steamer Duck can fly, it rarely does.
Chubut Steamerduck - It is the most recently recognized species of steamer duck, being described only in 1981. This is because it is only found along a rather small and sparsely populated stretch of coast around the Golfo San Jorge in southern Chubut and northern Santa Cruz Provinces, and because steamer ducks in general look fairly similar in plumage.
Flying Steamer Duck - The Flying Steamer Duck, Tachyeres patachonicus, is a steamer duck. It is the most widespread steamer duck, resident in southern Chile and Argentina, Tierra del Fuego and the Falkland Islands. Its plumage is very similar to the other three steamer ducks. It is the only steamer duck which can fly, and the only one to occur on inland fresh waters.
Flightless Steamerduck - This species is locally infamous for the aggressive disposition of adult males. Incidents have allegedly occurred where a raging male was placed by a misguided collector among adults of various other waterfowl species and killed all the other birds with their powerful, spurred wings.