Ducks 



Ring-necked Duck 



Aythya collaris 

 '1991-95 = 88 



WWM -- 



WW--W 



W--W 



--W - 



-w 



Greater Scaup 



Aythya marila 

 1991-95 =4 



-WW-- 



w 



W--W 



--W 



Lesser Scaup 



Aythya affinis 

 1991-95 = 129 



WW--W W-- 



WW--W 



W-Ww 



--WW-wW--- 

 -w 



Harlequin Duck 



Histrionicus histrionicus 



1991-95 = 45 

 TES 



-W 



t 



t 



- t - t t ------ t 



t 



t t - t - - t - - - - 



t - t 



25 



