Family Vireonidce Warbling Vireo 85 



other vireos, does not restrict himself to morning 

 and evening hours, but may be heard even at noon- 

 day. He is the only vireo who sings on the wing; 

 and so in love is he with music that in the vicinity 

 of New York at least, he does not intermit his mel- 

 ody until early September, while even ^after this 

 time isolated songs may still be heard. 



LITERATURE: 



Nesting Habits of the Yellow-throated Vireo. Goss, "The Auk," 

 Vol. I. 



37. WARBLING VIREO ; WARBLING GREENLET 



(Vireo gi lints .^) 



Upper parts olive-green ; under parts grayish white with a tinge 

 of yellow; a narrow white line above eye, which does not run 

 back behind it. Beak and feet dark. Bird distinctly smaller 

 than a sparrow. Sexes similar. 



THE warbling and red-eyed vireos are so similar 

 that it is almost impossible to distinguish them by 

 the eye when alive. The warbling vireo is, how- 

 ever, rather smaller than his brother, and is a far 

 more beautiful singer. He may be sought among 

 the higher branches of roadside trees, where he 



O 



would be easily overlooked were it not for his 

 music. He comes to us in early May, and leaves 

 again in early September. 



