246 PASSERES: Perching Birds 



PLUMBEOUS GNATCATCHER 



(752. Polioptila plumbea) 4 in. 



Black cap; gray back; white eye-ring and under parts; tail with 

 more white than the Black-tailed, and less than the Western 

 Gnatcatcher. 



Females are not always distinguishable in the field from the 

 Western where these forms occur together, as in southeastern 

 California in winter. 



BLACK-TAILED GNATCATCHER 



(753. Polioptila californica) 4| in. 



Male: Dull slate-gray above; shining black cap; tail with 

 narrow white edge; dull gray below. 



Female: Differs from male only in absence of black cap. 



A characteristic bird of the Lower Sonoran Zone. 



FAMILY WREN-TITS 



Small; long-tailed; short-billed; dull brown in color. Closely 

 related to the Bush-Tits. 



PALLID WREN-TIT 



(742a. Chamaea fasciata henshawi) 6^ in. 



Grayish brown above, nearly uniform; below pinkish brown, 

 obscurely darker-streaked on breast; tail long. 



Call: A low, confidential chatter, as the bird creeps through 

 thick brush. Song: A loud " tick, tick," repeated with increasing 

 rapidity, but changing to whistled notes on same pitch. Locally 

 called " Ground Wren." 



In shape resembles Bush-Tit, but much larger. 



