PHILADELPHIA VIREO. 
626. Vireosylva philadelphica. 5 inches. 
This is one of the least common of the eastern Vireos, 
although it is more common than most people know; 
its song is not distinctive and it keeps high up in trees, 
so it is not usually noticed. Their nests are swung from 
branches at high altitudes and are seldom found. 
WARBLING VIREO. 
627. Vireosylva gilva. 5 inches. 
Above clive-green; crown grayer but with no black 
border. ‘These are among the most common of the 
Vireos and may be found eyen in the hearts of large 
cities, swinging their pretty little nests high up in shade 
trees. Their song is after the style of that of the Purple 
Finch, very different from that of the Red-eye. The 
eggs are white with a few brown specks on the large end. 
These birds breed throughout the U. 8S. and southern 
Canada. 
