FAM. XXIX. HAWKS, EAGLES, ETC. 



205 



feathered legs, and tlie under parts spotted with black and 

 buffy. The basal half of the tail is 

 almost white and the rest very dark, 

 but usually showing two or three 

 grayish bars. The spotted under parts 

 form a dark band across the belly. 

 This rather sluggish, low-flying, al- 

 most exclusively mouse-eating hawk, 

 is more nocturnal in its habits than 

 any other of our species. 



Length, 19-23 ; wing, 16-18; tail, 9-11 ; 

 tarsus, 2J ; oulmen, IJ. Northern North 

 America; breeding north of the United 

 States, and wintering south to Virginia. 



20. Ferruginous Rough- leg (348. 



Arcluhuteo fernighieiis). — A large, 



western, somewhat mottled, brownish- t 



red hawk, with the under parts white, ^'""^'="'' Bough-legged Hawk 



much barred with rufous across the belly. The tail is grayish- 

 white tinged with rufous. The young is 

 more grayish-brown, with the base of tail 

 white. This is a hawk of the open prairies 

 west of the Mississippi. 



Length, 21-25 ; wing, 16-19 ; tail, 9-11 ; tarsus, 

 2J ; culmen, 1|. "Western North America from 

 North Dakota to Texas, and west to the Pacific; 

 breeding from Utah northward ; casually east to 

 Illinois. 



21. Golden Eagle (349. Aqiiila chrysaetos). 

 — A very large blackish-brown bird, with 

 lighter, almost golden, back head and back 

 neck ; base of the tail for more than 

 half its length is white, and the tarsus is 

 white-feathered to the toes. The young 

 is blacker in general plumage, and the base 

 Ferruginous Eough-leg of the tail is more or less banded with 



