Hawks. 



335. Harris Hawk {Tarabuteo unicinctus harrisi) 

 L. J*, 19; 9,22. Longer upper tail-coverts, base and 

 tip of tail white. Ads. Shoulders, thighs and under 

 wing-coverts, reddish brown; under tail-coverts white. 

 Yng. Similar but streaked below with rusty, buff and 

 black; legs barred with white. Notes. A long, harsh, 

 Buteo-like scream. (V. Bailey.) 



Range.— Middle America from Panama north to southern Texas, 

 rarely Mississippi and iouthern California. 



337. Red-tailed Hawk (Buteo borealis). L. J 1 , 20; 

 9,23. Four outer primaries notched. Ads. Tail 

 rusty brown with a black band, sometimes broken, 

 near its tip; below buffy white, a band of spots across 

 the belly; legs usually without bars. Yng. Tail gray- 

 ish brown with a rusty tinge and numerous blackish 

 bars; upper tail-coverts barred black and white; below 

 less buffy than in adult; legs more often barred. Notes. 

 A shrill whistle, suggesting the sound of escaping 

 steam. 



Range.— Eastern North America, west to the Great Plains, north to 

 about latitude 60 ° ; breeds throughout its range; winters from Mass- 

 achusetts, Illinois and South Dakota southward. 



337a. Krider Hawk (B. b. hriderii). Similar to 

 No. 337, but nearly or wholly white below. Ads. 

 Usually without black tail band. 



Range. — "Great Plains of United States from Minnesota to Texas: 

 east irregularly or casually to Iowa and northern Illinois." (Bendire). 



337b. Western Red-tail (B. b. calurus). Very 

 variable in color. Ads. Sometimes sooty brown 

 above and below with more or less rusty; in light phase 

 resembles No. 337, but tail averages paler and some- 

 times has more than one bar; the underparts are deeper 

 and legs are usually barred with rusty. Yng. Similar 

 to Yng. of No. 337, but markings below heavier; 

 flanks more barred. 



Range. — Western North America from Rocky Mountains to Pacific: 

 north to British Columbia, south to central America; generally resi- 

 dent. 



337d. Harlan Hawk (B. b. harlani). Ads. Above 

 sooty brown; tail closely mottled with blackish, rusty 

 and whitish; below varying from white, more or less 

 spotted on belly to sooty brown. Yng. Similar, but 

 tail barred with blackish, gray, rusty or whitish. 



Range. — "Gulf States and Lower Mississippi Valley, north (cas- 

 ually) to Kansas. Iowa, Illinois and Pennsylvania; east to Georgia, 

 and Florida." (Bendire). 



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