BIK»S OF IVEM^ YORK 



Memoir 12. N, Y. State Museum 



Plate 16 





3.. 



REDHEAD ,-c * ^ 



Aythya americana (Bytoa) , - . ■ r,y-^ 



"*"' c„.u/A^3ACK bv Microsoft® 



Aythya vallisneria (Wilson) 



, MALES 



All J nat. size 



