Aleutian Tern
73. Sterna aleutica. 15 inches.
This handsome Tern is of the same form and size as the Common Tern, but has a darker mantle, and the forehead is white, with a black line extending from the bill to the eye.
Nest.—Is much the same as the Arctic, but the eggs are somewhat smaller and narrower (1.70 × 1.15).