Common Merganser

Mergus merganser
Photo by Tony Hisgett

The Common Merganser (North American) or Goosander (Eurasian) Mergus merganser is a large duck, of rivers and lakes of forested areas of Europe, northern and central Asia, and North America. It eats fish and nests in holes in trees. John James Audubon called this bird the Buff-breasted Merganser in his book "Birds of America". (source: Wikipedia)