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. — Northern South America, north to the Lower Rio Grande. 



626. Philadelphia Vireo {Vireo philadelphicus). L. 

 4.8. Ads. No distinct crown-cap; above oli^e-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, double-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 gilvus) . L. 5.4; W. 



^2.8. Ads. Above grayish olive-green, crown slightly 

 grayer but without 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; a rich, 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. swainsoni). 



Similar to No. 627, but averaging smaller, W. 2.6, the 

 bill more slender; upperparts, particularly crown, 

 grayer. 



Range. — Western United States, east to the Rockies; breeds from 

 Mexico to BritishColumbia; winters in Mexico. 



y 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?, and a 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- 

 tra! America. 



631a. Key West Vireo {V. n. maynardi) . Similar 

 to No. 631, but bill heavier, sides averaging less yel- 

 low. 



Range. — Southern Florida; resident. 



621b- Bermuda White-eyed Vireo (V. n. bermud- 

 ianus). Similar to No. 631, but wing shorter, 2.30; no 

 yellow on sides. (Bangs and Bradlee.) 



Range. — Resident in Bermudas. 



63 Ic. Small White-eyed Vireo (V. 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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