Genus Mergellus

Smew - The Smew is a small duck which is somewhat intermediate between the typical mergansers and the goldeneyes . It is the only member of the genus Mergellus; sometimes included in Mergus, this genus is well distinct and might actually be a bit closer to the goldeneyes. The Smew has interbred with the Common Goldeneye .

Order : Anseriformes
Family : Anatidae
Genus : Mergellus