Perching Birds Chiefly Dull Colored. 
625. Yellow-green Vireo (Vireo flavoviridis). L. 
6.4. Resembling No. 624, but greener above, the 
sides heavily washed with greenish yellow. 
Range.—Nosthern South America, north to the Lower Rio Grande. 
626. Philadelphia Vireo (Vireo philadelphicus). L. 
4.8. Ads. No distinct crown-cap; above olive-green; 
below yellowish; a whitish line over eye; no wing-bars. 
Notes. Resemble those of the Red-eyed Vireo but gen- 
erally higher pitched; also a very abrupt, dcuble-syll- 
abled utterance with arising inflection which comes in 
with the song at irregular intervals. (Brewster.) 
Range,—Eastern North America; breeds from Maine, New Ham- 
shire and Manitoba northward; winters in the tropics. 
627. Warbling Vireo (Vireo gilous). L. 5.4; W. 
2.8. Ads. Above grayish olive-green, crown slightly 
grayer but withoyt distinct cap as in No. 624; a whit- 
ish line over eye but no black line above it; below 
white, the sides washed with yellowish; no wing-bars. 
Notes. Call, resembles that of the Red-eyed Vireo; 
song; arich, firm, unbroken warble with an alto un- 
dertone. 
Range.—Eastern United States, west to the Plains; breeds from 
Gulf States north to Hudson Bay region; winters in Mexico. 
627a, Western Warbling Vireo (V. g. swatnsonz). 
Similar to No. 627, but averaging smaller, W. 2.6, the 
bill more slender; upperparts, particularly crown, 
grayer. 2 
Range.—Western United States, east to the Rockies; breeds from 
Mexico to BritishColumbia; winters in Mexico. 
631. White-eyed Vireo (Vireo noveboracensis). L. 
5; W. 2.4.; B. .4. Ads. Eye-ring and lores yellow; 
iris white; above olive-green more or less washed with 
grayish; below white, sides yellowish; two whitish 
wing-bars. Notes. Calls, varied, often harsh and 
scolding; song, an emphatic whistle who are you, eh? or 
what's that you say?, anda low medley often including 
imitations of the notes of other birds. 
Range,—Eastern United States; breeds from Florida and Texas 
north to New Hampshire and Minnesota; winters from Florida to Cen- 
tral America. 
631a. Key West Vireo (VY. 2. maynard’). Similar 
to No. 631, but bill heavier, sides averaging less yel- 
low. 
Range.—Southern Florida; resident. 
621b. Bermuda White-eyed Vireo (V. 2. bermud- 
ganus). Similar to No. 631, but wing shorter, 2.30; no 
yellow on sides. (Bangs and Bradlee.) 
Range.—Resident In Bermudas. 
631c. Small White-eyed Vireo (VY. n. micrus). 
Smaller than No. 631, W. 2.2; averaging grayer above; 
sides with less yellow. 
Range.—Northeastern Mexico, north to southeastern Texas. 
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