348 Field Museum op Natural History — Zoology, Vol. LX. 



Adult: General plumage, white; primaries, black; and primary- 

 coverts, pale ash. The immature bird has the head, neck, and upper 

 parts, raottled gray and white; the rump and tail are white; under 

 parts, white. 



Length, 23 to 28; wing, 14 to 17; bill, 2 to 2.35; tarsus, 2.90 to 

 3.20. 



The Lesser Snow Goose is more or less common in Illinois and 

 Wisconsin during the migrations, apparently much more numerous 

 along the Mississippi Valley than on Lake Michigan. 



68a. Chen hyperborea nivalis (Forst.). 

 Greater Snow Goose. 



Local name: White Brant. 



Distr.: Northeastern North America, breeds in the far North. 

 It is known to winter in numbers in the lower Mississippi Valley and 

 on the coast of North Carolina and Chesapeake Bay. Casual or 

 accidental as far south as Cuba and Jamaica. 



Snow Goose. 



Adult: Resembles the Lesser Snow Goose, but is larger. Wing, 

 17 to 17.75; bill, 2.50 to 2.70; tarsus, 3.10 to 3.50. Not uncommon 



