Ducks 



Ring-necked Duck 



Ay thy a collar is 



Www 



WW--W 



W--W 



--W 



-w 



Greater Scaup 



Ay thy a mania 



--W 



w 



W--W 



--W 



Lesser Scaup 



Ay thy a af finis 



Ww W-- 



WW--W 



W-Ww 



--WW-wW--- 

 -w 



Harlequin Duck 



Histrionicus histrionicus 



TES 



-w 



t 



t - t t t 



t 

 t t - t - - t - - - - 



t - t 



21 



