FAMILY AXATID.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; sinallor th:iu C. h. nivalis; bill, ow.v 1.90; 

 tarsus, over 2. SO; middle toe, over 2.10 (udult). Chiefly l»:iclfic coast to Mississi|>i)i \';illpy, 

 rare on Atlantic coast. Ghe7i hi/perboren. Lesser Snow Goose. 



See Xo. 121. 



Entire plumage, white ; primaries, black ; resembles precedins; species but is jarirer 

 (adult). Eastern Xortli America, south in winter on Atlantic coast to Floridji .•ind Cuba. 



Chen hypcrborea nivalis. Greater Snow Goose. 



See No. 12."). 



JJack, slaty brown; btdiy and rump, gray ; the feathers, not barred; terminal lialf of tail, 

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



See \o. 12(j. 



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; liill, 

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



Anser albifrons rjamheU. American White Fronted Goose. 



.See Xo. 12S. 



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



dusky ; rump, slaty brown; winn" coverts, cdji'cd with white i immature). 



Anser albifrons ijamlieU. American White Fronted Goose. 



See Xo. 12S. 



General plumage, grayish; rump, white; smaller than C. h. ninilis; hill, over l.itO; 



tarsus, over 2. SI): miildlc tor. over 2. 10 (iuuiiat lire), ("liiclly I'.acific coast to Mississippi N'alley; 

 rarr oil At laiitic coa<t. Chen hiipcrhorcd. Lesser Snow Goose. 



Sec No. 124. 



(ieneral plumage, grayish; rump, white; iari^er than >M"/a//.s. immatuif). E.-istcrn 

 Norlli AiiHTira, -oiiib in winlcr to Mmiila and <'uba. 



(Jhoi hi/i>rrhor('ii nirnlis (ireater 5now (ioose. 



Sre Nu. I2.".. 



Head, brownish gray; cliiii, while; rump, gray; uiii;uis i nail of bill), yi-llow ; w iiiir 

 covert -1, grayisli, -illowiiig \''r\ liiilc \\bil'' on I bi- rdm- ul thi' feathers (immatun'K 



Chen C(vriilfsr,iis. Blue Goose. 

 See No. 12r,. 



