25 



Length about 4 inches ; some white on back and 

 wings ; migrant, Winter Wren. 



bb. General cast of plumage not as above, 

 c. Upper parts uniform dark olive ; walkers and 

 wagtails. 



Lower parts clearly tinged with sulphur-yellow, 

 sharply streaked, Water Thrush. 



Lower parts tinged with buff, rather indistinctly 

 streaked, Louisiana Water Thrush. 



cc. Upper parts not uniform dark olive ; hoppers ; 

 usually not wagtails, 

 d. No yellow, 

 e. Black and white only. 

 Cap solid black, 



Male Black-poll Warbler. 

 Cap with a white stripe through middle. 



Black and White Warbler. 

 ee. Not simply black and white, 

 f. General color more or less bright blue. 



Above sky-blue, beneath white, streaked 

 on breast, 



Male Caerulean Warbler. 

 Indigo-blue ; no white, 



Male Indigo-bird. 

 ff. General color not largely bright blue. 



Grayish, black-capped and black-throated, 



Chickadee. 



Metallic green above ; length about 3 inches, 



Ruby-throated Humming-bikd. 



Pale warm brown, lightest beneath ; lower 



mandible white, Female Indigo-bird. 



Grayish-bhi§ above, rusty reddish beneath, 



Red-breasted Nuthatch. 



