440 



Key to Plate No. 26 Plate No. 26 -* 



WINTER AND AUTUMN PLUMAGES 



(A) AMERICAN SCOTER, adult male. 



(B) AMERICAN SCOTER, adult male wing. 



(C) AMERICAN SCOTER, adult female. 



(D) AMERICAN SCOTER, adult female wing. 



Chief distinguishing features of AMERICAN SCOTER: MALE, (a) Hind 

 toe with lobe, (b) yellow protuberance at base of bill above, (c) feather- 

 ing of forehead ends square across base of bill, (d) high forehead and 

 rounded head. FEMALE, (a) Hind toe with lobe, (b) very dark crown, 

 clearly defined against cheeks, chin and throat, (c) and (d) as in male. 



(E) WHITE- WINGED SCOTER, adult male. 



(F) WHITE- WINGED SCOTER, adult male wing. 



(G) WHITE- WINGED SCOTER, adult female. 



(H) WHITE- WINGED SCOTER, adult female wing. 



Chief distinguishing features of WHITE- WINGED SCOTER: MALE, (a) 

 Hind toe with lobe, (b) white speculum, and small white patch near eye, 

 (c) feathering on ridge of bill extends nearly to nostril, and feathering on 

 sides of bill nearly as far as that on ridge, (d) head elongated, slope of 

 forehead follows line of bill. FEMALE, (a) Hind toe with lobe, (b) white 

 speculum, (c) and (d) same as male. 



Downy Young, Plate No. 35. 

 Text: American Scoter, page 338; White-winged Scoter, page 325. 



