126 



YOSEMITE NATURE NOTES 



WARBLING VIREO (Vireo sil- 

 vus): 5-6 in. Above olive-iiray; below 

 uhitf; tinge of yellow on sides; ivhite 

 line over eye. Song a series of warbled 

 notes, often repeated. Usually solitary. 



Frecjuents deeiduous trees such as 

 willows, enttonwoods, and alders. Seeks 

 higher levels in trees than the other 

 vireos. In the Sierra S. V. chiefly in 

 the Upper Sonoran to the Canadian 

 life-zone. Found on both slopes of the 

 \'oseiiiite region but most common on 

 the western slope. 



WOOD WARBLERS: 



Family Compsothlypidac 



ORANGE-CROWNED WARBLER 



(Vermivora celata): V/^-^ in. Top of 

 head with oran'^e, usually obscure; in- 

 distinct yelloicish line over eye to bill; 

 upper parts olive-green, brightest on 

 rump: wings darker, without bars; un- 

 der parts dull yellow to whitish. 



Frequents underbrush in areas of 

 mixed woodland; in summer chiefly in 

 the Upper Sonoran to the Canadian 

 lif(>-zone. More widely distributed dur- 

 ing migration. In the ^'osemite region 

 S. V. on both slopes of the Sierra. Not 

 common in "\'osemite Valley. Upmoun- 

 tain movements may occur after breed- 

 ing. Individuals have been seen at 

 10 500 feet on Mount Clark. 



NASHVILLE WARBLER fVermiv- 

 ora rufua})illa): 4-434 in. Top and 

 sides of head ash-<iray with indistinct 

 chestnut patch on crown: back olive- 

 C[recn : wliite eve-ring: below yellow; 

 lower hcllv whitish. Female: All plum- 

 age reduced in color. 



Fre()uents o])en forests with an un- 

 derstorv of bushes. Forages well up in 

 tr;('s Init nests on or near the ground. 

 S \'. ( biefly in the Transition and lower 

 Ciaui'di.m life-zones along the west 

 slop- of t!ic Sierra. Widespread M. In 

 th'.' ^'osemite region, as at Yosemitc 

 \'allev, to be found among the black 

 oaks and maples. 



YELLOW WARBLER fDendroica 

 aestiva): 4-5 in. Body brillinnt yellow 



YELLOW WARBLER 



4-5 



'"'' h^/l ^; 



\j^\,rj 



'' /fi'-^?/y 



\\ 



WARBLING VIREO 



5-6 



below, with scattered rufous streaks on 

 chest and belly, faint or absent in fe- 

 male: above greenish - yellow; wings 

 and tail dusky; yellow spots in tail. A 

 descending, high - pitched, twittering 

 song. 



Frequents canyons and streambanks 

 especially where grown to broadleaf 

 trees such as willows, cottonwoods, as- 

 pens, alders, etc. S. V. in the Lower 

 Sonoran to the Transition life-zone on 

 both slopes of the Sierra. Common in 

 Yosemitc Valley. 



Al' DC BON'S WARBLER fDen- 

 droica auduboni): •I'i/i-D'/i in. L'ppcr 

 parts bluish-gray, streaked with black; 

 wings with broad white patch; white 



