Appendix, 



the other a sparrow. The black phcebe is a 

 familiar breeding bird over the greater part of the 

 State, nesting on ledges of outhouses, and it is 

 always solitary or in pairs. 



76. Olive-sided Flycatcher ; Contopus boreaiis 

 (Swains.). 



A plain oUve-brownish bird, darker on the back, 

 grayer below. It is a difficult species to recog- 

 nize from the wood pewee, but the concealed 

 white flank tufts are an infallible mark of identi- 

 fication if they can be seen. The white line 

 down the center of the under parts is more 

 sharply defined in contrast to the brownish gray 

 of the sides, and this latter color is more streaked 

 in appearance. It is a summer inhabitant of 

 the woodlands of California, soHtary in habits 

 and frequently uttering its loud, pensive call. 



J J. Western Wood Pewee; Contopus richard- 

 sonii (Swains.). 



Smaller than the preceding. Length about six and 

 a half inches. Faint whitish wing bands. 

 Coloration olive-brown, darker on head, paler 

 below. Throat and belly white, the latter 

 faintly tinged with yellow. A summer resident, 

 generally distributed in the woodland. 



78. Western Flycatcher; Empidonax difficilis 

 Baird. 



With this bird we come to the group of little oliva- 

 ceous flycatchers, which are so much alike that 

 the average observer will find great difficulty in 

 distinguishing them. They may be readily 



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