416 



Key to Plate No. U Plate No. 14 - 



AUTUMN PLUMAGES 



(A) GREEN- WINGED TEAL, adult male in early stage of autumn moult. 



(B) GREEN- WINGED TEAL, adult male in later stage of autumn moult. 



(C) BLUE-WINGED TEAL, adult male in early stage of autumn moult. 



(D) BLUE- WINGED TEAL, adult male in later stage of autumn moult. 



(E) WOOD DUCK, adult male during autumn moult. 



(F) CINNAMON TEAL, adult male in early stage of autumn moult. 

 Note : Wings during the autumn moult are as in full winter plumage. 



EXPLANATION OF THE AUTUMN MOULT 



During autumn, the males of the ducks are moulting out of the "eclipse" 

 plumage, which closely resembles that of the female, into the full winter plumage 

 of the drake. A careful examination of the plumage characters will disclose 

 some indications of the male winter dress slight in the early autumn but pro- 

 gressively increasing as the season advances. The full range of the moult will 

 be best appreciated if the plates showing the female plumage and that of the 

 male in winter are examined at the same time as this plate. 



Young males of the year follow much the same sequence of moult out of the 

 juvenile plumage (which also resembles that of the female) and are similar to 

 adult males during the autumn moult, except for the wings, which differ as stated 

 in "Description" of Juvenile in the text. 



Consult "Specimen Identification" in the text, and section on "Identification 

 of a Specimen in Hand." 



Winter plumages: 



Green-winged Teal, Plate No. 12 

 Blue-winged Teal, Plate No. 13. 

 Wood Duck, Plate No. 15. 

 Cinnamon Teal, Plate No. 13. 



Text : Green-winged Teal, page 198 ; Blue-winged Teal, page 204 ; Wood 

 Duck, page 221 ; Cinnamon Teal, page 210. 



