74 



KEY T(l 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 ; :i piitcli of dull white on I'aoe iit liase of 

 bill; speculum, white (feuuile'. 



Aijthiiu ninrihi. Greater Scaup Duck. 

 Bluebill. Black-head. 



See Xo. lOn. 



A^-tliva iiiiiiil!!. 



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

 of bill; back, lilack; speculum, white (male)- 



(rJnnrioncUa tii/iii/nhi <imerii-tni(i. American Qolden Eye. Whistler. 



See No. 108. 



Head, bluish black, or purplish blue; au in'egulai- white patch on check at base of 

 bill (male). Ohiiicionettd ishimlica. Barrow's Qolden Eye. 



See No. 1011. 

 Top of head, brown ; sides of head, brownish white ; speculum, gray ; Iiill, move 

 than one and a (|uartei- inches loni;- ^female). Aylliiiit niaerkiiiin. Red=headed Duck. 



See Xo. KW. 



IJill, not ovei- l.'2.T lon^; a patch of white, or grayish white, on the head, including 

 the eye; no speculum ; under tail covert, \\bite; adnll males have the tail feathers long' and 

 pointed. ClatKjiila hijnnalU. Old Squaw. Long=tailed Duck. 



See No. 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, black, o-lnssed with green; back, grayish white, finely 

 lined witli black; speculum, white (male). 



Anilujamiirild. Greater Scaup Duck. 

 Blue-bill. Black-head. 



See No. 105. 



Aythya marila nearctica. 



For (iii'ectiolis for ineaHUreiiiciit, sec pagt! 9. 



