BIRDS OF YOSEMITE NATIONAL PARK 



127 



marks on tail feathers; patch on crown, 

 each side near wing-bend, throat, and 

 rump yellow; breast blackish; black of 

 breast obscure and yellow markings 

 paler in female; immature birds, as a 

 rule, show conspicuously only yellow 

 rump-patch and white in tail. Forages 

 well up in the trees. 



In summer frequents chiefly conifers 

 in the Transition to the Hudsonian life- 

 zone but habitat more varied in win- 

 ter. Widespread in summer in the 

 Yosemite region in the zones men- 

 tioned. In winter common visitant to 

 the Upper Sonoran zone. Often to be 

 seen throughout the year in Yosemite 

 Valley. 



AUDUBON'S WARBLER 



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BLACK-THROATED 

 GRAY WARBLER 



BLACK-THROATED GRAY 

 W ARBLER (Dendroica nigrescens) : 

 4/2-3 in. Head largely black; two white 

 bands on side of head, one below, other 

 above, eye, joining to encircle black 

 cheek-patch; yellow spot in front of 

 eye; back bluish - gray, marked with 

 black spots; white under parts; sides 

 with black lines; white wing-bars; white 

 outer tail feathers. Female: Gray 

 streaks on head; black collar bordering 

 white throat. 



In many areas attracted to oaks, es- 

 pecially canyon live oaks, but also fre- 

 quents conifers and chaparral. S. V. to 

 the lower western slopes of the Sierra, 

 in the Upper Sonoran and Transition 

 life-zones. To be found among the can- 

 yon live oaks of the talus slopes along 

 the base of the north and south walls 

 of Yoscmiti' Valley. 



TOWNS END'S WARBLER (Den- 

 droica townsendi): 4/2-3 in. Above 

 olive-green marked with black; white 

 wing-bars; top of head and throat 

 black with ring of yellow around black 

 cheek-patch; breast and sides yellow; 

 belly white; sides streaked with black: 

 white in tail. Female: Throat largely 

 yellow. 



Frequents upper foliage of live oaks, 

 laurels, and conifers. M. along the west 

 slope and eastern base of the Sierra. 

 C. V. to the Yosemite region. Has been 

 seen frequently in Yosemite Valley. 



HERMTT WARBLER (Dendroica 

 occidentalis): 4/2-5 in. Head brilliant 

 yellow; throat black; back gray with 

 black streaks; few or no streaks on 

 white under parts: white wing-bars; 

 white outer tail feathers. Female: Head 

 dull yellow, mottled on top with black- 

 ish ; throat with dusky spots 'on white. 

 Commonly forages and nests 20 feet 

 or more above the ground. 



Frequents conifers. S. V. in the 

 Sierra, chiefly in the Transition and 

 Canadian life-zones. Widespread M. 

 Seen in the Mariposa Grove, along the 

 Pohono Trail, and commonly in Yo- 

 semite Valley. 



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