Appendix, 



1 8. Western Goshawk; Acciptter atricapillus 

 striatulus Ridgw. 



Length of male twenty-two inches, of female 

 twenty-four. Adult, top of head blackish 

 brown; back deep lead color, sometimes nearly 

 black and generally tinged with brownish; lower 

 parts white, with fine irregular wavy cross-bars 

 of slaty. A white line above and behind the 

 eye. Tail dark, with four or five blackish bars. 

 The immature birds are dark brown above, 

 irregularly mottled with reddish brown and buif, 

 especially about the head ; below white, with 

 firm spots and stripes of dark brown. Tail dis- 

 tinctly barred and white tipped. An inhabitant 

 of the dense forests of the Sierra Nevada Moun- 

 tains. 



19. Western Red-tailed Hawk; Buteo borealis 

 calurus (Cass.). 



Very variable in color. Length of male twenty- 

 one, of female twenty-four inches (about the 

 size of the preceding). Adult, above grayish 

 brown or blackish brown, mottled with rusty; 

 below varying from white or buff, more or less 

 streaked with brown dusky markings, to dark 

 blackish brown. The distinctive mark is the 

 bright reddish brown tail, edged with buff or 

 whitish and with one or more blackish bars. 

 The immature birds are similar to the adult, but 

 with the tail more distinctly and numerously 

 barred, and grayish brown in color. The most 

 abundant and widely distributed of the larger 

 hawks of California, breeding everywhere in 

 favorable places. 



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