While at Delta Ponds this morning, I watched some Hooded Mergansers that were quite a ways out in the pond. In this shot the male is in the lead with two females following close behind. I could tell in the full frame that the male had something in its beak, but not what. In this cropped picture, one can see that it definitely does have a catch that looks like a fish or frog.
On my computer screen it appears that an eye is visible like that of a fish. In other frames, the male tried to swallow it and finally got it down! It was fun to watch, but I could only really see it by using an 18-300mm zoom lens.