FAMILY ANAT1D.E. DUCKS, GEKSE, AND SWANS. 83 



Section 2. Bill and feet, pink or flesh color in life; head, 

 white, sometimes tinged with brownish orange. 



Entire plumage, white; primaries, black; smaller than C. h. nivalis; bill, over 1.90; 

 tarsus, over 2.80; middle toe, over 2.10 (adult). Chiefly Pacific coast to Mississippi Valley, 

 rare on Atlantic coast. Chen hyperborea. Lesser Snow Goose. 



See No. 124. 



Entire plumage, white; primaries, black; resembles preceding species but is larger 

 (adult). Eastern North America, south in winter on Atlantic coast to Florida and Cuba. 



Chen hyperborea nivalis. Greater Snow Goose. 



See No. 125. 



Back, slaty brown ; belly and rump, gray ; the feathers, not barred ; terminal half of tail, 

 not white (adult). Chen ccerulescens. Blue Goose. 



See No. 126. 



Section 3. Bill, pinkish ; feet, yellow or pink ; head, 

 brownish or grayish, sometimes marked with white. 



Forehead and feathers at base of bill, white; nail of bill (unguis), whitish; bill, 

 yellowish in dried skin; breast, grayish, more or less marked or spotted with black (adult). 



Anser albifrons gambeli. American White Fronted Goose. 



See No. 128. 



No white on forehead or base of bill; bill, yellowish in dried skin; nail of bill (unguis), 



dusky ; rump, slaty brown; wing coverts, edged with white (immature). 



Anser albifrons yambeli. American White Fronted Goose. 



See No. 128. 



General plumage, grayish; rump, white; smaller than C. h. nivalis; bill, over 1.90; 

 tarsus, over 2.80 ; middle toe, over 2.10 (immature) . Chiefly Pacific coast to Mississippi Valley ; 

 rare on Atlantic coast. Chen hyperborea. Lesser Snow Goose. 



See Xo. 124. 



General plumage, grayish; rump, white; larger than nivalis. (immature). Eastern 

 North America, south in winter to Florida and Cuba. 



Chen hyperborea nivalis Greater Snow Goose. 

 See No. 125. 



Head, brownish gray; chin, white; rump, gray; unguis (nail of bill), yellow; wing 

 coverts, grayish, showing very little white on the edge of the feathers (immature). 



Chen ccerulescens. Blue Goose. 

 See No. 126- 



