442 



Key to Plate No. 27 Plate No. 27 



WINTER AND AUTUMN PLUMAGES 



(A) SURF SCOTER, adult male. 



(B) SURF SCOTER, adult male wing. 



(C) SURF SCOTER, adult female. 



(D) SURF SCOTER, adult female wing. 



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

 with lobe, (b) white patch on forehead, and another on nape, (c) head 

 elongated, forehead following slope of bill, (d) a peculiar varicoloured bill, 

 see "Description." FEMALE, (a) Hind toe with lobe, (b) black crown, two 

 poorly defined white cheek-patches, whitish patch on back of head, (c) as 

 in male. 



(E) WHITE- WINGED SCOTER, juvenile. Sexes alike. 



(F) SURF SCOTER, juvenile. Sexes alike. 



(G) AMERICAN SCOTER, juvenile. Sexes alike. 



(Note: The juvenile White-winged Scoter is readily recognized by 

 its white speculum. These three juveniles can be separated by the shape 

 of the head and by the featheration at base of bill. Compare the heads 

 with those of the respective adults. See "Descriptions.") 



Downy Young, Plate No. 35. 



Text : Surf Scoter, page 333 ; White-winged Scoter, page 325 ; American 

 Scoter, page 338. 



