74 KEY TO THE BIRDS OF EASTERN NORTH AMERICA. 



* Group 4. Wing, 8.50 to 10 inches long. 



Section 1. Hind toes, with well defined membraneous lobe 

 or flap; belly, white, sometimes tinged on lower part 

 with dusky or gray; head, marked with more or less 

 white, or brownish white. 



: // 



Head, brownish ; a patoli of dull wliite on face at base of 

 bill; speculum, wliite (female '. 



Aiithyii inarihi. Greater Scaup Duck. 

 Bluebill. Black=head. 



8ee Xo. 105. 



Aytliya iiiarila. 



Head and neck, dark glossy green ; a nearly round patch of wliite on cheek at base 

 of bill; back, black; speculum, white (male). 



GlanrioncUd chnKjuJa amerirana. American Golden Eye. Whistler. 



See No. 108. 

 Head, bluish black, or purplish blue; an irregular white patch on cheek at base of 

 ))ill (male). (UaAicionetta Mnndica. Barrow's Golden Eye. 



See Xo. lOi). 

 Top of head, brown ; sides of head, brownish white ; speculum, gray ; bill, more 

 than one and a (piarter inches lonii^ (female). Aytlnja nmeric/nui. Ked=headed Duck. 



See Xo. K«. 

 Bill, not over 1.2.5 lon<>-; a patch of white, or grayish white, on the head, including 

 the eye; no speculum; under tail covert, white; adult males have the tail fcalhcrs long and 

 pointed. Clanyula hycmalis. Old Squaw. Long=tailed Duck. 



See Xo. 111. 



Section 2. Hind toe, with well defined membraneous lobe 

 or flap ; belly, white, sometimes tinged on lower part 

 with dusky or gray; no white, or grayish white, on 

 head. 



Head, ](>lack, glossed with green; back, grayish white, linely 

 lined with black ; speculum, white (male). 



Aiji/itj/i'inarHd. Greater Scaup Duck. 

 Blue-bill. Black=head. 



See No. 105. 



Aythya marila ncarctica. 



For directions for measurement, see page 9. 



