KEY TO THE WATER BIRDS OF FLORIDA. 29 



I.eno^th, 17; Wing, 7.50; Tarsus, 1.30: Bill, 1.75. 



Head black with violet gloss ; speculum gray. Aythya collaris (male). 



Ring=neck Duck. See page 97 



Length, 16.50; Wing, S.25 ; Tarsus. 1.40; Rill, 1.60. 



Head brown ; speculum white. Qlaucionetta clangula ameri= 



cana (female). 

 American Golden Eye. 

 Whistler. See page 99 



Hind toe with well=defined membranous lobe or flap. 



Belly white, sometimes grayish or blackish on lower part. 

 Head showing more or less white or grayish white. 



Giaucioiietta clangula americana. 



Length, including lengthened tail, 21 ; Wing, 8.50; Bill, 

 I. Tail pointed ; central feathers longest; under 

 tail coverts white. 



Length, 17.75; Wing, S.25 : Tarsus, 1.30; Bill, 1.60. 

 liead hrownisii showing wliite at base of bill ; 

 speciiliiiii Avhite. 



Length, 16.50; Wing, 7.70; Tarsus, 1.25; Bill, 1.50. 

 Similar to preceding, but somewhat smaller. 



Clangula hyemalis. 



Clangula hyemalis. 



Old Squaw. See page 100 



Aythya marila nearctica 

 (female). 

 Greater Scaup Duck. 

 Blue=bill. See page 96 



Aythya affinis (female). 

 Lesser Scaup Duck. 

 Blue°bill. See page 97 



