126 



WARBLING VIREO 



Warbling Vireo : Vireo gilvus. 



Upper parts grayish green ; under parts slightly washed with 

 yellowish ; no wing bars. Length, about 5| inches. 



GEOGRAPHIC DISTRIBUTION. North America; breeds as far 

 north as the Hudson Bay region ; winters in the tropics. 



The Warbling Yireo is peculiarly a village bird, 

 and when the Red-eye lives in town the two will 

 be heard at the same time. 

 The song of the Warbling 

 can easily be distinguished, 

 for the broken utterances of 

 the Red-eye are totally differ- 

 ent from the smoothly flow- 

 ing warble of the smaller 

 bird. When seen, the ab- 

 sence of the gray cap will 

 mark off the Warbling from 

 his larger cousin, though one 

 does not often get sight of 

 the little olive bird, he is so 

 busy in the elm-tops where 

 his mate builds her nest 

 and lays her eggs smaller 

 counterparts of those of the Red-eye. Doctor 

 Brewer says the Warbling is particularly abun- 

 dant among the elms of Boston Common, and 

 Mr. Torrey also reports it there. 



FIG. 62. 

 Warbling Vireo. 



FIG. 63. 

 Red-eyed Vireo. 



