The Scaup Ducks. 347 



said to resemble the female, but may be 

 separated by the head and neck being 

 darker, or blackish brown. 



The young ducklings of both sexes 

 change from down into a plumage which 

 resembles closely that of the adult female, 

 but the white parts round the base of the 

 bill are suffused with brown. Young 

 males may be found during the winter in 

 all states of plumage intermediate between 

 that of the male and that of the female. 

 The early assumption of black feathers 

 on the head, and of black and white 

 vermiculations on the scapulars, serve to 

 indicate the young male. 



Male : length about 20 ; wing nearly 

 9 ; tail 2\. Female : length about 18 ; 

 wing 8; tail 25. In both sexes the bill 

 is greyish blue or lead-colour ; the irides 

 yellow ; the legs and feet greyish blue or 

 leaden-grey. I cannot find any record 

 of the weight of this Duck. 



