YELLOW-THROATED YIREO 133 



quickly in a lower key ; another resembles the syllables 

 to-wee' -choo, the singer sliding from a high to a low note. 

 Sometimes the singer has a fit of ecstasy in which he runs 

 his phrases, ordinarily separated by considerable intervals, 

 rapidly together, and follows them by sweet twittering. 

 The song is not infrequently heard in the autumn, when 

 the bird is migrating south. The alarm-note is an unmusical 

 chatter, similar to that of the Yellow-throated Vireo. 



The white ring around the eye of the Solitary Vireo and 

 the white line from the eye to the hill are excellent field- 

 marks. 



Yellow-throated Vireo. Vireo fiavifrons 



5.95 



Ad. — Head and upper back greenish-yellow in strong light; 

 rest of back gray; wing-bars white; throat and breast bright yellow. 



Nest, a cup hung from a twig, from ten to twenty-five feet above 

 the ground. Eggs, white, spotted with brown at the larger end. 



The Yellow-throated Vireo is a summer resident in cen- 

 tral and southern New York and New England ; it is rare 

 north of Massachusetts. It arrives in early May, and stays 

 till the middle of September. Like the Warbling Vireo it 

 prefers the shade trees in the village streets and about houses, 

 and the tall trees along streams; in the northern part of its 

 range it is found only along the alluvial flood plains of large 

 rivers. After an interval of silence in August, it sings again 

 in September, especially early in the morning, and continues 

 to do so till its departure. 



The song in form resembles those of the Eed-eye and 

 the Solitary, and differs from that of the Warbling Vireo. 

 It is made up of separate phrases, one w4th a rising, the 

 next with a falling inflection. The notes are louder and 

 richer than those of the Ked-eye, but generally harsher and 

 more querulous than those of the Solitary. The phrases are 

 separated by considerable intervals, giving the song a more 



