Jan., 1909. Birds of Illinois and Wisconsin — Cory. 



161 



Family CUCULID^. Cuckoos. 



Feet, zygodactyle (two toes in front, two behind) ; first primary, 

 about half as long as third ; outer tail feathers, much shorter than 

 middle ones. 



I 



Yellow-billed Cuckoo. 



Upper parts, brownish t^ray, with faint fjloss of s^reenish; under 

 mandible, mostly yellow ; greater portion of primaries, rufous brown, 



tipped with grayish olive; under parts, (hill white; outer tail feathers, 

 black, tipped with white. C^occyzits auicricaims. 



Yellow-billed cuckoo. 



See No. 185. 



U])per parts, i^rayish brown, with faint j^doss of green; bill, black; 

 no rufous brown on ])rimaries; under parts, dull white; outer tail 

 feathers, like back in color. Coccyzus erythrophlhalmus. 



Black-billed Cuckoo. 

 vSee No. 1S6. 



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