Redhead 



Aythya americana 



1996-2002 = 93 



Ring-necked Duck 



Aythyo col I oris 



1996-2002 = 71 



Greater Scaup 



Aythya mania 



1996-2002 = 9 



Lesser Scaup 



Aythya afjinis 



1996-2002= 102 



29 



