40 



a. Conspicuously crested. 



Color largely blue, Blue Jay. 



No blue at all, Cedar Bird. 



aa. No crest, 

 b. Length 2 feet or more ; black Raven. 



bb. Length under 20 but over 16 inches ; black, Crow. 

 bbb. Length under 14 inches ; not black, 

 c. Breast bright yellow, Yellow-breasted Chat. 



cc. Breast not yellow. 



Bright ferruginous above. Brown Thrasher. 

 Slate color, Cat Bird. 



. Length under 6f inches, 

 a. Nostrils covered by a tuft of bristly feathers. 



Throat black. Chickadee. 



Throat rusty-red. Red-breasted Nuthatch. 



Throat white. White-breasted Nuthatch. 



aa. Nostrils not as above ; tail feathers rigid and sharp 



pointed like a woodpeckers, Brown Creeper. 



aaa. Nostrils and tail feathers not as above. 



b. (/olor chiefly brown, more or less waved with darker ; 



wings and tail barred. 



Length over 4| inches ; wings equal to tail. 



House Wren. 

 Length under 4^ inches ; wings much longer 

 than tail, Winter Wren. 



bb. Color not as above, 

 c. Bill conical, slender ; bristles at base short or 

 wanting. 

 d. Length 5^ inches or more ; tail feathers without 

 white, 

 e. Crown golden-brown. Oven Bird. 



ee. Crown not golden-brown, 

 f . Not spotted beneath, Worm-eating Warbler. 



