Range. - North America, breeding chiefly north of the United States except in some of the higher ranges along our northern border. A small Falcon, about 11 inches long, often confused with the Sharp-shinned Hawk, but much darker and a more stoutly built bird. It is a daring species, often attacking birds larger than itself; it also feeds on mice, grasshoppers, squirrels, etc. They generally build a nest of sticks in trees, deep in the woods; less often in natural cavities of dead trees; and sometimes on rocky ledges. Their four or five eggs have a brownish buff ground color, heavily blotched with brown and chestnut. Size 1.50 x 1.22
Range. - Pacific coast from northern United States north to Alaska.
Very similar in appearance to the preceding, but much darker, both above and below. Its nesting habits and eggs will not differ in any manner from those of the Pigeon Hawk.
Range. - Interior of North America from the Mississippi to the Rockies and from Mexico to the Saskatchewan.
This species is similar to the Pigeon Hawk, but is paler both above and below, and the tail bars are more numerous and white. Their nesting habits are the same as those of the preceding species, they either building in hollow trees, or making a rude nest of sticks and twigs in the tops of trees. The eggs have a creamy ground and are sprinkled with dots and blotches of various shades of brown. Size 1.60 x 1.23. The egg figured is one of a beautiful set of four in the collection of Mr. C. W. Crandall.
Richardson's Pigeon Hawk.
This common European species was once accidentally taken in southern Greenland. Their eggs are generally laid on the ground on cliffs or banks.