KEY TO THE WATER BIRDS OF FLORIDA. 161 
Length, 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 229 
Length, 16.50; Wing, 8.25; Tarsus, 1.40; Bill, 1.60. 
Head brown; speculum white. Glaucionetta clangula ameri- 
cana (female). 
American Golden Eye. 
Whistler. See page 231 
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. 
G!aucionetta clangula americana. Clangula hyemalis. 
Length, including lengthened tail, 21; Wing, 8.50; Bill, 
1. Tail pointed; central feathers longest; under 
tail coverts white. Clangula hyemaiis. 
Old Squaw. See page 232 
Length, 17.75; Wing, 8.25 ; Tarsus, 1.30; Bill, 1.60. 
Head brownish showing white at base of bill; 
speculum white. Aythya marila nearctica 
(female). 
Greater Scaup Duck. 
Length, 16.50; Wing, 7.70; Tarsus, 1.25; Bill, 1.50. Blue=bill. See page 228 
Similar to preceding, but somewhat smaller. 
Aythya affinis (female). 
Lesser Scaup Duck. 
Blue-bill. See page 229 
