244 NY ROC A FULIGULA 



Hybrids. In the wild state the hybrid between this species and the Common 

 Pochard is perhaps the most usual, though crosses with the White-eyed Duck have 

 been several times recorded. 



In confinement this duck has crossed with many other species, including the 

 Scaup (Rotterdam Gardens — Biittikofer, in litt.), the male Golden-eye (Astley, 

 1921, p. 99), the Rosy-billed Duck (Astley, in litt.), the White-eyed Duck (very 

 commonly), the European Widgeon (Heinroth, 1911), the Carolina Duck (Poll, 

 1911), and the Garganey (Naumann, 1895-1906). Hybrids between this and the 

 White-eyed Duck breed freely inter se and with their parents, but I have no in- 

 formation regarding the fertility or sterility of the other crosses. 



