FA3I. XXIX. HAWKS, EAGLES, ETC. 



201 



bars. Four of the outer primaries are notched on the inner 

 web, and the shoulders are not marked with reddish. Its food 

 consists mainly of small quadrupeds, but it will not refuse 

 birds, insects, or reptiles. (Hen Hawk ; Chicken Hawk.) 



Length, 19-25; wing, 13|-17J; tail, S^-IO'- ; tarsus, 3; culmen, 1|. 

 North America from the Plains eastward, south to eastern Mexico ; 

 breeding about throughout. Krider's Hawk (337". B. b. kriderii) of 

 Minnesota to Texas and westward (casual in Iowa and Illinois) is a 

 light-colored form, pure white below and with the tail bar nearly lost. 

 Western Red-tail (337'>. B. b. calurus) of North America, west of the 

 Rocky Mountains (casual in Illinois), is a nearly evenly colored, dark 

 chocolate-brown hawk, with the red tail crossed by several black bars. 

 Harlan's Hawk (337*. B. b. hArlani) of the Gulf States (casually north 

 to Pennsylvania, Iowa, and Kansas) is nearly uniform black, with the tail 

 rather longitudinally mottled with dusky and white, and having more or 

 less of the red tinge and the zone of black near the tip. (Black Warrior.) 



11. Red-shouldered Hawk (339. BUeo Unehtus). — A common 

 hawk, with much brownish-red on head, shoulders, breast, and 

 belly. The tail and primaries are black, with 

 broad bars of white. The throat is streaked 

 with blackish, and the breast and belly are much 

 barred with white or whitish. The young is 

 very different and hard to determine; above 

 plain, dark brown, with little indication of the 

 red shoulders ; head, neck, and under parts are 

 nearly white, fully streaked with dark brown ; 

 tail and wing quills brown, crossed with many in- 

 distinct, lighter and darker bars. Four primaries 

 are notched on the inner web. This is a bird of 

 well-watered woods, living on small quadrupeds, 

 insects, and reptiles, in the order given. (Misap- 

 plied names : Hen Hawk ; Chicken Hawk.) 



Length, 17J-22; wing, ll|-14i; tail, 8-10; tarsus, 

 3 ; culmen, 1. North America from the Plains eastward, 

 north to Manitoba and Nova Scotia, south to Mexico ; 

 breeding throughout. The Florida Red-shouldered Hawk 

 (339°. B. I. aieni) of South Carolina to Texas, mainly coastwise, is a 

 smaller hawk, with a streaked, grayish-white head, grayish throat, indis- 

 tinctly barred, buffy under parts and no red shoulders. 



Ked-siouldered 

 Hawk 



