FAM. XXIX. HAWKS, EAGLES, ETC. 205 



feathered legs, and the under parts spotted with black and 

 bulfy. 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, 21 ; culmen, 1|. Nortliern North 

 America; breeding north of tlie United 

 States, and wintering soiUh to Virginia. 



-.20. Ferruginous Rough- leg (348. 

 Archibhteo fernKjineus). — A large, 

 Avestern, somewhat mottled, brownish- 

 red hawk, with the under parts white, °'^™*'^ ""^ ' ®&S® 

 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 

 Avhite. This is a hawk of the open prairies 

 west of the Mississippi. 



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

 2^ ; culmen, \\. 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. Aquila chn/saetos). 



— A very large blackish-brown bird, with 



lighter, almost golden, back head and back 



neck ; base of the tail for more than 



_^ ^^^ -^M^ half its length is white, and the tarsus is 



^^^■to^pi^gSj^ white-feathered to the toes. The young 



/^tfr~" \v^ is blacker in general plumage, and the base 



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



