16 



5. Not one of the above four groups. 



A. Breast and belly distinctly clear, unspotted \\hite. 



a. Length 12 inches ; upper parts iridescent olive-brown. 

 Much white on tail ; bill yellow and black, 



Yellow-billed Cuckoo. 

 Little white on tail ; bill bluish and black, 



Black-billed Cuckoo. 



aa. Length 7 to 9 inches ; upper parts not olive-brown. 



Blackish-ash ; tail broadly white tipped, King Bird. 



Light slate color ; wings and tail black with white 



markings, Loggerhead Shrike. 



Various shades of brown and black ; winter visitor, 



Snow Bunting. 



B. Breast and belly not entirely unspotted white, 

 a. Blue a conspicuous color in the plumage. 



Length 11 inches ; black, white and blue, Blue Jay. 



Length 7 inches ; blue above ; chestnut on breast ; 

 belly white. Bluebird. 



aa. No conspicuous blue. 



b. Black or deep purple, in mass, a conspicuous part 

 of the coloration. 

 c. L'nicolor. 

 d. Lustrous blue-black ; length 7^ inches, wing 

 nearly twice as long as tail, 



Male Purple Martin. 



dd. Iridescent black ; length over a foot ; tail 



noticeably long and wedge-shaped. 



Iridescence of head steel blue ; of back brassy ; 



of wings violet, Bronzed Grackle. 



Iridescence not specially defined in color or area, 



Purple Grackle. 



ddd. Lustrous black ; head brown ; length 7^ 



inches, Male Cow-bird. 



