^7 



142. Buteo borealis horealis (Gmel.), S.N., 1, p. 

 (1788). [Carolina.] 

 Red -tailed Buzzard. 



266 



Light form, pure white below with few or no 

 markings ; sub -terminal tail -bar reduced or 

 obliterated. 

 142a. Buteo borealis hrideri (Hoopes), Pr. Ac. Nat. 

 Soc. Philad., 1873, p. 238, pi. 5. [Iowa.] 

 Krider's Hawk. 



StrongJy developed form of B. borealis borealis, 

 more strongly marked below, especially 

 on thighs, and with more bars than the 

 sub-terminal one on tail ; melanisms are 

 frequent, but they usually retain the rufous 

 tail. 

 142b. Buteo borealis calurus Cassin, Proc. Ac. Nat. 

 Sci. Philad., vii., p. 281 (1855). [Netv Mexico.] 

 Western Red -tail. 



Perhaps a melanism of B. borealis borealis ; 

 size similar, but more robust ; nearly uniform 

 sooty-brownish-black, with much Jess of 

 concealed white ; tail mottled with greyish, 

 dusky-white and rufous, with subterminal 

 black band. 

 142c. Buteo borealis harlani (Aud.), Bds. Am., i., p. 

 86 (1830). [Louisiana.] 

 Harlan's Buzzard. 



E. North 

 America, N. 

 to Canada 

 and New- 

 foundland 

 W. to Gt. 

 Plains. 



Gt. Plains, 

 from Mis- 

 souri and 

 Minnesota, 

 W. to Rocky 

 Mountains, 

 N. to S. 

 Manitoba. 



W. North 

 America, be- 

 ^rond W. edge 

 of Gt. Plains 

 E. to Middle 

 Yukon, S. to 

 Guatemala ; 

 Guadaloupe 

 Is. 



Lower 

 Mississippi 

 Valley & Gulf 

 States, from 

 Louisiana to 

 Georgia and 

 Florida. 



