Artificial Key 13 



Head and breast showing very slight greenish reflections. 

 Purple Grackle, Female, (p. 122.) 



19. Under parts white or grayish. Go to 20. 

 Under parts chestnut. Go to 25. 



Throat and upper part of breast yellow, crossed by a 

 patch of brown; upper parts gray-blue; yellow patch 

 between shoulders. Parula Warbler, Either Sex. 

 (P- 79-) 



20. Birds considerably larger than a robin; crest conspicuous. 



Go to 21. 

 Birds not larger than a robin; no crest. Go to 23. 



21. Upper parts of uniform gray-blue with white collar; tmder- 



parts in the main white, but with a gray- blue band 

 across the breast. Belted Kingfisher, Either Sex. 

 Go to 22. 



Back grayish blue; wings and tail bright blue, conspicu- 

 ously marked with black and white; under parts gray; 

 upper part of breast crossed by a black crescent. Blue 

 Jay, Either Sex. (p. 132.) 



22. Under parts white, except for gray-blue breast band; sides 



under the wings dull blue. Belted Kingfisher, 

 Male. (p. 149.) 



Chestnut band across belly, in addition to breast band; 

 sides under wings chestnut. Belted Kingfisher, 

 Female, (p. 149.) 



23. Wings very long; bird swallow-like. Go to 24. 



Wings moderate; tail very short; under parts white; bird 

 addicted to running up and down trunks of trees. 

 White-breasted Nuthatch, Either Sex. (p. 54.) 



