GREEN, GREENISH GRAY, AND OLIVE 447 
The young are naked when hatched, but feather into 
a soft mottled gray with glints of blue and green on 
the upper parts and the under parts nearly white. 
They are fed on small insects by regurgitation. 
627. WARBLING VIREO. — /7reo gilvus. 
Famity: The Vireos. 
Length: 5.00-5.50. 
Adults: Upper parts olive grayish ; top of head dull ash-gray ; rump 
and upper tail-coverts pale olive-green ; white streaks through eye ; 
wings and tail plain dusky brown ; sides of head pale brownish ; under 
parts dull white, tinged with olive yellow. 
Young: Top of head and hind-neck very pale grayish buff; lores and 
superciliary region white ; rest of upper parts buffy, wings with buffy 
bars; under parts pure white, except for yellowish under tail-coverts. 
Geographical Distribution: North America from Great Slave Lake to 
Mexico. 
California Breeding Range: Through upper Sonoran and Transition 
zones. 
Breeding Season: May and June. 
Jest: A strong, durable basket, made of bark strips and fine grasses on 
the inside ; suspended by the brim from forks of horizontal branches. 
Eggs: 4 or 5; white, spotted, with reddish brown and lilac around the 
larger end. Size 0.70 X 0.55. 
THE soft green plumage, unstreaked above and merg- 
ing to greenish white below, is so characteristic of the 
Vireo family as to win for them the name of Greenlets, 
which to the non-scientific observer seems quite as ap- 
propriate as Vireo. They are small birds, so nearly the 
color of the leaves as to be observed with difficulty, ex- 
cept for their friendly habit of stopping to chat with you 
awhile at close range. Each different species has a dif- 
ferent remark to make, but whatever is said you are sure 
