Bufflehead vs Hooded Merganser are two species of diving ducks that are often confused with each other. Both species have similar plumage, but there are key differences that can help you to identify them.
Buffleheads are smaller than Hooded Mergansers, with a body length of 13-15 inches and a wingspan of 22-25 inches. They have a round head and a short, thick neck. Their plumage is black and white, with a white patch on the back of the head and a white crescent-shaped mark below the eye. Buffleheads have a black bill and dark brown eyes.