KEY TO DUCKS, GEESE AND SWANS OF NORTH AMERICA. 



19 



Head and neck, rufous brown ; crown, blackish ; speculum, green. Western 



species, rare east of the Mississippi Eiver. 



Cinnamon Teal. 



Anas cyanoptera (male) . 



See page 49. 



Head, not rufous; sides of head, speckled ; chin and throat, dusky, tinged 

 with rufous ; belly, witli distinct spots ; speculum, green. Western species 

 rare east of the Mississippi Kiver. 



Cinnamon Teal. ' 



Anas cyanoptera (female). 

 See page 49. 



Section 3. Hind toe without membraneous lobe or flap ; 



no blue on wing. 



Head, yellowish brown with black lines on nape ; no 

 green speculum ; rump and tail, black ; belly, tawny 



brown. 



Fulvous Tree-Duck. 



Dendrocygna fulva. 

 See page 90. 



Dendrocygna fulva. 



Section 4. Hind toe with well defined membraneous lobe 

 or flap ; head marked with more or less white or brown= 

 ish white ; belly, white, sometimes tinged with dusky or 

 gray on lower part. 



Head, brownish ; a patch of dull white on face at 

 base of bill; speculum, white. 



Oreater Scaup Duck, Blue Bill. 



Aythya marila nearctica (female). 

 See page 56. 



Aythya marila nearctica. 



Speculum, white, similar to preceding but somewhat smaller. More common 

 in the South than the Greater Scaup Duck. Lesser Scaup Duck. 



Aythya affinis (female) . 

 See page 57. 



Speculum, gray ; head and neck, brownish; chin and anterior portion of lores, 

 brownish white or whitish ; resembles female ; Ked-head, but is smaller. 



Ring-necked Duck. 



Aythya collaris (female) . 

 See page 58. 



