FAM. nil. riREOS 



99 



parts light greenish-yellow and a whitish line over the eye. 

 There are no wing bars. This is a smaller and rarer bird than 

 No. 2, but with similar habits and song. 



Length, 5 ; wing, 2| (2|-2|) ; tail, 2 ; tarsus, | ; culmen, |. Eastern 

 North America ; breeding from New Hampshire north to Hudson Bay, 

 and wintering south of the United States to Central America. 



5. Warbling Vireo (627. Vireo gilvus). — An olive-green- 

 baeked, white- or whitish-bellied vireo, without wing bars and 

 with some yellowish on the sides. This, as its name indicates, 

 is a good, continuous " warbler " of rich notes. It lives mainly 

 among the tops of tall trees, so that it can be heard more 

 easily than seen. 



Length, 5|; wing, 2 J (2|-.3) ; tail, 2^; tarsus, f; culmen, |. North 

 America in general ; breeding nearly throughout, and wintering in eastern 

 Mexico. 



6. Yellow-throated Vireo (628. Vireo Jldbvifrons). — An olive- 

 green-backed, bright-yellow-breasted, white-bellied vireo, with 

 two distinct white wing 



bars. It is an inhabi- 

 tant of the tree tops. ^ 

 Its notes are deep, rich, 

 and varied, and occa- 

 sionally it shows a 

 power of song which 

 is surprising in its 

 fine and intricate qual- 

 ity. The bird looks in Tellow-throated Tireo 

 color much like the yellow-lDreasted chat, though decidedly 

 smaller. 



Length, 5|; wing, 3| (3-3|^); tail, 2|; tarsus, f ; culmen, |. Eastern 

 United States ; breeding from Florida north to Ontario, and wintering 

 from Mexico to Central America. 



7. Blue-headed Vireo (629. Vireo soUtcirius). — An olive-green- 

 backed, bluish-headed vireo, with the lower parts, ring around 

 eye, and two wing bars white. It is, like the vireos in general, 

 an inhabitant of the woods and a fine singer. (Solitary Vireo.) 



