KEY TO THE WATER BIRDS OF FLORIDA. 165 
Length, 28; Wing, 16; Bill, 2.20; Tarsus, 3.10. Head 
white; rest of plumage grayish. Chen cerulescens. 
Blue Goose. See page 237 
Length, 28; Wing, 16; Bill, 2; Tarsus, 2.90. Head 
brownish; bill yellowish; nail black. A line of 
white at base of bill (adult). Anser albifrons gambeli. 
American White-fronted Goose. 
See page 238 
Length, 26; Wing, 13.50: Dill, 1.40; Tarsus, 2.40. 
Head entirely black ; bill black. Branta bernicla. 
Brant. See page 240 
SupramMity CYGNINAE. Swans. 
Olor columbianus. 
Length, 53; Wing, 21.50; Bill, 4; ‘Tarsus, 4.20. 
Distance from front of the eye to nostril longer 
than from nostril to tip of bill. A spot of yellow 
on the lores in the adult; young birds gray. En- 
tire plumage white. Olor columbianus. 
Whistling Swan, See page 240 
