No. 21. 



Merganser serrator. 



Adult male. Head, long hairy crest, and a little of reck 

 black, with greenish gloss ; the neck beneath this, white ; lower 

 neck and fore-breast a rather light chestnut brown, speckled 

 streakily with black. Front of back and the wings black and 



No. 21. Adnlt Male. 



white, as in picture ; this black connected with that of head by 

 black line on back of neck; remainder of back and sides of 

 body a wavy pattern of narrow white and black lines. Under 

 parts white. Bill and legs red, the former dusky on top. 



Female. Head and upper part of neck principally reddish 



