VIREOS 89 



WARBLING VIREO 



Vireosylva gilva gilva. Case 7, Fig. 29 



Smaller than the Red-eye, without black and white lines over 

 the brown eye, the underparts faintly tinged with yellowish. 

 L. 5i- 



Range. Nests from Louisiana'and North Carolina to Canada; 

 winters in the tropics. 



Washington, rather common S. R., Apl. 21-Sept.' 12. Ossining, 

 tolerably common S. R., May 3-Sept. 18. Cambridge, locally 

 common S. R., May 5-Sept. 15. N. Ohio, abundant S. R., Apl. 

 17-Oct. 10. Glen Ellyn, not common S. R., May i-Sept. 15. 

 SE. Minn., common S. R., May 3-Sept. 15. 



While the Red-eye's song lasts the greater part of the 

 day, the Warbling Vireo's continues for only about four 

 seconds, then, after an interval, it is repeated. It is an 

 unbroken strain running up and down the middle of the 

 scale and has it in a reminder of the Purple Finch's lay. 

 This species is less generally distributed than the Red- 

 eye. It may be common in one locality and absent from 

 another. Its nesting habits and eggs are much like those 

 of the Red-eye, but the male has the singular custom of 

 singing while it sits upon the nest. 



PHILADELPHIA VIREO 

 Vireosylva Philadelphia^. Case 7, Fig. 30 



A small, olive-green Vireo, with pale yellow underparts and a 

 whitish line over the eye. L. 



Range. Nests from northern New England and northern 

 Michigan into Canada; winters in the tropics. 



Washington, very rare T. V., May; Sept. Ossining, rare T. V., 

 Sept. 20-Oct. 20. Cambridge, rare T. V. Glen Ellyn, rather 

 rare T. V., May 14, 15; Aug. 21-Sept. 30. SE. Minn., uncommon 

 T. V., May 9. 



Rarest of our Vireos; but few students know it as a 

 migrant and fewer still as a nesting bird. Its song and 

 nesting habits resemble those of the Red-eye. 



