FAMILY VIREONIDA. — VIREOS. Died 
Group 3. Wing, from 2.75 to 3.25 inches long. 
Bill, with small but distinct hook; no streaks on back or breast; 
breast or throat, never spotted. 
First primary, longer than fourth; back and rump, olive; crown, plumbeous 
gray, or bluish gray; no dusky streak from base of bill on sides of throat ; 
underparts, white, tinged with pale yellowish green on sides of body. 
Red-eyed Vireo. 
Vireo olivaceus. 
See No. 470. 
Similar to Vireo olivaceus, but having a 
dusky streak or line extending from 
base of lower mandible on side of 
throat. 
Black=-whiskered Vireo. 
Vireo calidris barbatulus. 
See No. 469. 
First primary, very short and narrow; crown and back, grayish olive; under- 
parts, dull white, faintly tinged with olive, or yellowish on sides; no white 
wing bars. 
Warbling Vireo. 
Vireo gilvus. 
See No. 473. 
