The Flightless Steamer-Duck is a large, stocky duck of southern South America. Found in coastal waters, the species has extremely short wings that leave a large patch of the rear flank exposed. Steamer-ducks have a peculiar habit of flapping their wings and running along the water's surface when alarmed, reminiscent of steamboats. This duck usually occurs in pairs or in small family groups. The Flightless Steamer-Duck can be identified by its large size, whitish gray head, bright orange bill, gray body and wings, and white wing patches.