Keywords: Pochard.arp.750pix.jpg Captive-bred duck probably a hybrid between Pochard Aythya ferina and Canvasback Aythya valisineria at Slimbridge Wildfowl and Wetlands Centre Gloucestershire England Own Taken by Adrian Pingstone in February 2004 and released to the public domain From w en Image Canvasback arp 750pix jpg Arpingstone Aythya hybrids Birds in WWT Slimbridge |