129. Mergus americanus. 25 in.

Bill, feet and eye red in male, the former with a black stripe along the top; plumage black and white, with a greenish-black head; no crest. Female gray and white, with brown head, crested; chin white; eye yellow. These birds have the bill long, not flattened, but edged with sharp teeth to grasp the fish, upon which they live to a great extent. They are exceptionally good swimmers for members of this family, and can chase and catch their fish, using their wings to aid their legs in propelling them through the water.

Nest. - In holes of trees, cavities among the rocks, or less often on the ground. The nest is made of leaves and grasses and lined with downy feathers from the breast of the female. The 6 to 9 eggs are creamy-buff (2.7 x 1.75); June.

Range. - Whole of North America. Breeds from New Brunswick, North Dakota and California, northward. Winters from the northern boundary of the U. S. south to the Gulf of Mexico.