126 Birds of Oregon and WasJiington 



Particular Description. — Head, brownish-gray ; 

 a faint whitish line over eye ; back, clear olive-gray ; 

 wings, greenish-olive ; breast, dull white ; pale yellowish 

 sides. 



Summer resident. 



CASSIN'S VIREO. 



General Description : 



Upper parts : bluish head and grayish-olive 



back. 

 Under parts : dull white with yellowish sides. 

 Length, 5 to ^.6 inches. 

 Found in partly open country, in deciduous trees of 

 rather low growth. 



Cassin's Vireo is another bird that belongs 

 chiefly to the Pacific coast. It is, like the birds 

 of other families already named belonging to 

 the western part of the continent, a bird to re- 

 joice in. His song is characteristically vireoish 

 — a kind of warble with a touch of the metallic 

 in it. 



He may be distinguished from the warbling 

 Vireo by his lower perch, by his less flowing 

 song, and also by his markings, which are alto- 

 gether his own. 



