THE BIRD BOOK 



341. Sennett's White-tailed Hawk. 

 Buteo albicaudatus sennetti. 



Range. — Mexican border of the United States 

 and southward. 



A large, handsome Hawk which may be iden- 

 tified by its dark upper parts and white under- 

 pays and tail, the flanks and tail being lightly 

 barred with grayish; the shoulders are chest- 

 nut. It is especially abundant in the southern 

 parts of Texas, where it builds its nests of 

 sticks and weeds, lined with grasses, leaves 

 and moss. They nest in March and April, lay- 

 ing two, or rarely three, eggs which are a dull 

 white, and generally immaculate, but occasion- 

 ally faintly or sparingly spotted with brown. 

 Size of eggs 2.25 x 1.80. 



342. Swainson's Hawk. Buteo swains oni. 

 Range. — Central and western North America, 



from the Mississippi Valley and Hudson Bay, 



to the Pacific coast, breeding throughout its 



range. 

 In the greater part of its range, this is 



the most abundant of the Hawk family. 

 Its plumage is extremely variable, showing all the intergradations from a uni- 

 form sooty blackish to the typical adult plumage of a grayish above, and a 

 white below, with a large breast patch of rich chestnut. Their nesting habits 

 are as variable as their plumage. In some localities, they nest exclusively in 

 trees, in others indifferently upon the ground or rocky ledges. The nest is the 

 usual Hawk structure of sticks; the eggs are white, variously splashed and 



Sennett's White-tailed Hawk 





>» 



White 



spotted with reddish brown and umber. Size 

 2.20 x 1.70. Data.— Stark Co., N. D., May 21, 

 1897. Nest of sticks, lined with weeds in an 

 ash tree. Collector, Roy Dodd. 



212 



Swainson's Hawk 



