ioo RAPTORES: Birds of Prey 



HARRIS HAWK 



(335. Parabuteo unicinctus harrisi) 17-21 in. 



Sooty brown, with extensive rusty patch on shoulder and 

 rusty flanks. Tail black with white tip and white base. These 

 are very conspicuous in any position. 



Immatures, streaked dark brown and buffy. 



Noted as a great killer of small rodents. Appears especially 

 fond of wood-rats. Might be of considerable economic value if 

 it inhabited agricultural rather than desert regions. 



ZONE-TAILED HAWK 



(340. Buteo abbreviates) 19-21 in. 



Wholly black, or blackish, except for three white bands on 

 under side of tail; these, seen from above, are gray (tail of 

 Mexican Black Hawk has one band). 



A rather slender, long- winged and long-tailed bird, easily 

 confused with the Black Hawk except when seen in flight over- 

 head. Is said to be strikingly similar in action to the Turkey 

 Vulture, for which it is easily mistaken when tail-bars are in- 

 visible, though much smaller. 



FERRUGINOUS ROUGH-LEG 



(348. Archibuteo ferrugineus) 22-24 in. 



Adult, normal phase: Whole upper parts a mixture of rusty 

 and dusky, more or less gray-edged; flanks finely barred with 

 rusty, otherwise all white below; spread wings, seen from below, 

 white with dark spots in rows. Individuals vary considerably. 

 Melanistic phase: Wholly deep chocolate-brown, varied with 

 rusty spots or edges; somewhat lighter below. 



Known locally as " Squirrel Hawk/' from its food habits. 

 Recognized as a most beneficial bird. 



MEXICAN BLACK HAWK See Appendix. 



(345. Urubitinga anthracina) 19 in. 



MEXICAN GOSHAWK See Appendix. 



(346. Asturina plagiata) 17 in. 



