398 



Key to Plate No. 5 Plate No. 5 - 



(A) Ross's GOOSE, adult. Sexes alike. 



(B) Ross's GOOSE, adult wing. 



(C) Ross's GOOSE, juvenile. Sexes alike. 



(D) Ross's GOOSE, juvenile wing. 



Chief distinguishing features of Ross's GOOSE: (a) White plumage, 

 with black primaries and grey primary-coverts, (b) reddish bill, with warty 

 protuberances on base of upper mandible, (c) very small size. 



(E) LESSER SNOW GOOSE, adult. Sexes alike. 



(F) LESSER SNOW GOOSE, adult wing. 



(G) LESSER SNOW GOOSE, juvenile. Sexes alike. 



(II) LESSER SNOW GOOSE, juvenile wing. 



Chief distinguishing features of LESSER SNOW GOOSE: (a) White plu- 

 mage, with black primaries and grey primary-coverts, (b) red bill, with 

 broad black "grinning" patch. 



(Note: The Greater Snow Goose is identical with the Lesser Snow 

 Goose, except that it is a larger, heavier, chunkier bird with a thicker neck 

 and larger head and bill.) 



Downy Young, Plate No. 32. 



Text: Ross's Goose, page 144; Lesser Snow Goose, page 127; Greater 

 Snow Goose, page 132. 



