48 ANSERES: Lamellirostral Swimmers 



SNOW GOOSE 



(169. Chen hyperboreus hyperboreus) 26 in. 



Pure white, except black primaries. Bill dull red ; feet and legs 

 black. 



Immatures have back streaked with gray, otherwise generally 

 gray- washed. 



The white-and-black pattern is distinctive except as against 

 the Ross Goose, which probably does not now visit our region. 



WHITE-FRONTED GOOSE 



(17 la. Anser albifrons gambeli) 28 in. 



Adults: Brownish gray or gray-brown above, with front of 

 head white (hence name); under parts and fore-neck lighter, 

 breast variously black-barred or spotted, occasionally all black. 

 Feet and legs orange. 



Immatures: Similar to adults, but without white on head, and 

 breast without black markings. 



The breast-barring is evident in flight, the white face when 

 resting. 



FULVOUS TREE-DUCK 



(178. Dendrocygna bicolor) 22 in. 



Body rusty brown; back black, with brown barring; a black 

 stripe down back of neck; tail-coverts white. 



Immatures: Paler and duller, without definite barring on back. 



This Duck, closely allied to the Swans, may often be recog- 

 nized by its long legs and large feet, which appear entirely too 

 heavy for their owner. 



ROSS GOOSE See Appendix. 



(170. Chen rossi) 21 ii?. 



