FAMILY ANATID.E. DlCK.s, GKKSE, 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; smulltT Hum C. h. nivdlis ; bill, over l.!)0; 

 tarsus, over 2.80; middle toe, over 2.10 (^adult). Chiefly Pacific coa-^t to Mississii)pi \'allej', 

 rare on Atlantic coast, Gheii hyperborca. Lesser Snow Goose. 



See No. 124. 



Entire plumage, white; primaries, black; reseml)le.s precedinjj: species hut is hirj^er 

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



Chen hijpcrhorea nivalis. Greater Snow Goose. 

 See No. 125. 



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

 not white (adult). Chen cctrnlescetis. 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 spottt^d 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 i unguis), 



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



Anser albifrons ijamheli. American White Fronted Goose. 



See No. 12,s. 



General plumage, grayish; rump, white; smaller than C. h. nirdlis; bill, over l.ilO: 

 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. 



Set' \i). 12-1. 



General plumage, grayish; rump, white; larger than vm?//.s-. (immature). Eastern 

 North America, south iu winter to Florida and Cuba. 



Chen hyperborea nivalis Greater Snow Goose. 

 See No. 12."). 



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 cierulescens. Blue Goose. 

 See No. 126- 



