This male Common Merganser had a big appetite. I knew they ate fish, but had no idea they ate them this large and while I was photographing him he ate the whole thing! I also didn't know that gulls often follow flocks of foraging Common Mergansers. The gulls wait for the ducks to come to the surface with fish, and then they try to steal their prey. Occasionally even a Bald Eagle will try to steal a fish from a successful merganser