424 



Key to Plate No. 18 Plate No. 18 -* 



WINTER PLUMAGES 



(A) RING-NECKED DUCK, adult male. 



(B) RING-NECKED DUCK, adult male wing. 



(C) RING-NECKED DUCK, adult female. 



(D) RING-NECKED DUCK, adult female wing. 



Chief distinguishing features of RING-NECKED DUCK: MALE, (a) 

 Hind toe with lobe, (b) two bluish-white rings on bill, one at base and one 

 at tip, (c) grey speculum, (d) vague chestnut collar on lower neck. 

 FEMALE, (a), (b), (c) same as in male, (d) whitish ring around eye, and 

 whitish area at base of bill. 



(E) BUFFLE-HEAD, adult male. 



(F) BUFFLE-HEAD, adult male wing. 



(G) BUFFLE-HEAD, adult female. 



(H) BUFFLE-HEAD, adult female wing. 



Chief distinguishing features of BUFFLE-HEAD: MALE, (a) Hind toe 

 with lobe, (b) very small size, (c) puffy, dark head, with triangular white 

 head-patch, (d) wing mainly white. FEMALE, (a) and (b) same as male, 

 (c) white speculum, (d) white face-patch behind eye. 



Plumages, Plate No. 

 Downy Young, Plate No. 34. 



Text : Ring-necked Duck, page 236 ; Buffle-head, page 273. 



