TRAHL'S FLYCATCHER 



FIG. 78. Empidonax virescens 



(Nat. Size) 



A migrant from the eastern United States. 

 During the breeding season in the north it is 

 recognized by its characteristic call, a constant 

 speet uttered with a twitching of the tail. 

 Recorded from Lion Hill. This bird is especially 

 difficult to distinguish from E. t. traillii and 

 E. t. alnorum, but is of a greener olive shade 

 above, with yellower eye ring and wing bars. 

 Unlike them it is not especially partial to the 

 vicinity of water or damp places. 



39. Empidonax traillii traillii (Audubon) 

 Traill's Flycatcher 



Sexes alike. Length, 132 mm. (5.20 in.) ; tail, 

 57 mm. (2.25 in.). Above brownish olive; a ring 

 around the eye of dull whitish; wings with two 

 distinct bands of pale buff y gray ; chin and throat 

 pure white; the rest of the under parts white 

 tinged with pale yellow, rather heavily shaded 

 with blue gray on sides and across breast 

 321 



