KEY TO THE WATER lURDS OI" I'LORIDA. 165 



Length, 28; Wing, 16; Bill, 2.20: Tarsus. 3.10. Head 



white; rest of plumage grayish. Chen casrulescens. 



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 23S 

 Length. 26: Wing, 13.50: I!ill, 1.40: Tarsus. 2.40. 



Head entirely black ; bill l^lack. Branta bernicla. 



Brant. See page 240 



SUBFAMIEV CYGXIN.E. SWAX!> 



X 



# 



/-^^ 





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 



