16 



KEY TO DUCKS, GEESE AND SWANS OF NORTH AMEUKJA. 



GROUP II. 



Birds having wings from 6.50 to 7.50 inches long. 



Section 1. Bill narrow with tooth=like serrations; 

 crown with more or less of a crest. 



Crest, partly white (male) ; no white on crest 

 (female) . 



Hooded Merganser. 



Lophodytes cucuUatus. 

 See page 39. 



liOphodytes cucnllatus (male) . 



Section 2. Bill not narrow ; hind toe without flap or lobe. 



1 Large patch pale blue on wing (coverts) ; 

 ■white crescent on face (male) ; no white 

 crescent, face speckled; chin whitish (fe- 

 male) . Common in Eastern United States. 



Blue-winged Teal. 



Anas discors. 



See page 48. 



Large patch of pale blue on wing (coverts); head and hreast, rufous brown; 

 crown, blackish (male) ; sides of head, speckled (dull white dotted with 

 black); chin and throat, dusky, tinted with rufous (female). Western 

 species rare east of the Mississippi Kiver. 



Cinnamon Teal. 



Anas cyanoptera. 



See page 49. 



No blue patch on wing; head, rufous brown with large patch of green 

 through eye to nape ; speculum, black and green (male) ; head, speckled. 

 No blue patch on wing (female). 



Green-winged Teal. 



Anas caroUnensis. 

 See page 47. 



