402 



Key to Plate No. 7 Plate No. 7 -5 



(A) BLACK DUCK, adult male. 



Feather from side of chest shows distinctive U-shaped marking of 

 chest-feathers of full-plumaged adult male. 



(B) BLACK DUCK, head of adult female. 



Feather from side of chest shows distinctive V-shaped marking of 

 chest-feathers of full-plumaged adult female. 



(C) BLACK DUCK, wing of adult, both sexes. 



(D) BLACK DUCK, juvenile. 



Feather from side of chest shows lack of central marking as in adult. 

 Feather is narrower than that of adult. 



(E) BLACK DUCK, adult male in eclipse plumage. 



Feather from side of chest shows lack of central marking as in full 

 plumage. Bill and feet, duller than when in full plumage. 



(Note: Wings not fully grown. The bird here shown was painted 

 from a specimen shot on July 11, 1940, at Fort Severn, Ontario, on Hud- 

 son's Bay.) 



(F) BLACK DUCK, showing variation in colour of feet. 



Downy Young, Plate No. 33. 

 Hybrids, Plate No. 36. 



Text : page 16U. 



