I saw a great blue heron fly across the road with something very large in its mouth. Since it was flying toward the water and not away from the water, I had to believe it was not a fish. This was the best I could do to get close enough - even with max zoom - to see what it had...A round-tailed ground squirrel! It kept dunking the poor thing into the water, probably to kill it. I thought these guys pretty much ate fish only, but if the fishing isn't good, I guess they do what they can.