10 



B. Less than 2^ feet long. 



a. No conspicuous white marks. 



Purple, metallic patch on wing ; bill blunt, flat, 



Dusky Duck. 

 No metallic patch on wing ; bill acute, compressed, 



Holboell's Gbebe. 

 aa. More or less white on head, neck or wings, 

 b. With compressed, semi-circular crest. 



Hooded Merganser. 

 bb. No such crest. 



c. Little white on wings. 



A loose flowing cresf ; breast spotted. 



Wood Duck. 

 No crest at all ; breast unspotted, not black, 



Pin-tailed Duck,. 

 No crest; head, neck, upper breast black. 



Brant. 

 cc. Much white on wings, 

 d. Muchblue on wings, Shoveller Duck. 



dd. No blue on wings. 

 A slight, loose crest, 



Red-breasted Merganser. 

 No distinct crest, Common Merganser. 



',. Long-legged wading birds. 



A. Plumage white. 



Length over 3 feet, American Egret. 



Length about 2 feet, Snowy Heron. 



B. Plumage not white. 



a. Length over 3^ feet. Great Blub Heron. 



aa. Length, from 2 to 2^ feet. 



Prevailing colors buff and black ; a black patch on' 



side of neck, x Bittern. 



Prevailing colors not buff and black ; no black patch 



on side of neck. Night Heron. 



