Although larger (length 17 inches), the plumage of this species is almost exactly the same as that of the preceding. Like the last, this is also a destructive species. They construct their nests in the crotches of trees, generally at quite a height from the ground; the nest is made of sticks and twigs, and often lined with pieces of bark; occasionally an old Hawk's or Crow's nest is used by the birds. Their eggs are bluish white, unmarked or faintly spotted with pale brown. 334. GOSHAWK. _Astur atricapillus atricapillus._ Range.--Northern North America, south in winter to the northern parts of the United States. This species is one of the largest, strongest and most audacious of American Hawks, frequently carrying off Grouse and poultry, the latter often in the presence of the owner. It is a handsome species in the adult plumage, with bluish gray upper parts, and light under parts, finely vermiculated with grayish and black shafts to the feathers. Length 23 inches. Their nests are placed well up in the tallest trees, usually in dense woods, the nests being of sticks lined with weeds and bark. The three or four eggs are bluish white, generally unmarked, but occasionally with faint spots of brown. Size 2.30 x 1.70. [Illustration 207: Bluish white.] [Illustration: Cooper's Hawk.] [Illustration: Bluish white.] [Illustration: American Goshawk.] [Illustration: right hand margin.] Page 206 [Illustration 208: Geo. L. Fordyce. NEST AND EGGS OF COOPER'S HAWK.] Page 207 334a. WESTERN GOSHAWK. _Astur atricapillus striatulus._ Range.--Western North America from Alaska to California, breeding chiefly north of the United States except in some of the higher ranges of the Pacific coast. This sub-species is darker, both above and below, than the American Goshawk. Its nesting habits and eggs are precisely the same. The eggs are quite variable in size. 335. HARRIS'S HAWK. _Parabuteo unicinctus harrisi._ Range.--Mexico and Central America, north to the Mexican border of the United States; very abundant in southern Texas. This is a peculiar blackish species, with white rump, and chestnut shoulders and thighs. It is commonly met with in company with Caracaras, Turkey Buzzards and Black Vultures, feeding upon carrion. They also feed to an extent on small mammals and birds. Their nests are made of sticks, twigs and weeds, and placed in bushes or low trees. The three or four eggs are laid in April or May. They are dull white in color and generally unmarked, although often showing traces of pale brown spots. They are quite variable in size, averaging 2.10 x 1.65. [Illustration 209: Bluish white.] [Illustration: Harris's Hawk.] [Illustration: White.] [Illustration: right hand margin.] Page 208 337. RED-TAILED HAWK. _Buteo borealis borealis_.