202 



KEY AND DESCRIPTION 



12. Zone-tailed Hawk (340. Biiteo abbrevicttus). — A south- 

 western glossy-black to blackish-brown hawk; the tail has 

 three slate-colored bands above, and three pure white ones 

 below. The young has a grayish-brown tail crossed above 

 with numerous oblique black bands, and showing below mainly 

 the white inner webs. When disturbed, the feathers of this 

 hawk show much white, especially on the head and breast, as 

 much of the plumage is pure white at base. 



Length, 181-21J ; wing, 15-171; tail, 8l-10|; tarsus, 2^ ; culmen, 1. 

 Texas to southern California, south to northern South America. 



13. Bennett's White-tailed Hawk (341. Bhteo albicaudatus 

 sennetti). — A Texas, ashy or lead-colored, short-tailed hawk, 

 with the tail coverts, tail, and entire under parts white, and 

 the wing coverts chestnut. The tail has numerous narrow, 

 broken, zig-zag lines, and a broa.d black band near the tip. 

 The young is a brownish-black bird, with a grayish tail, becom- 

 ing darker near the tip. This hawk, like the last species, has 



white bases to many 

 of the feathers, 

 which show when 

 the plumage is dis- 

 turbed. 



Length, 23 ; wing, 

 141-18; tail, 7-10; tar- 

 sus, 31 ; cuUnen, 1|. 

 Southern Texas and 

 southward into Mexico. 



14. Swainson's 

 Hawk (342. Bitteo 

 sivai )isoni). — A 

 western, dark - col- 

 ored hawk, very va- 

 riable in color, but 

 usually with conspic- 

 uous dark patches on the sides of breast, and many (8-12) dark 

 tail bars. The breast has a large, cinnamon-red patch ; the 



Swainsoa's Hawk 



