Well, probably not the only catch of the day! I don't know how many fish per day a Great Blue Heron requires, but I do know they are prolific fishers. One of the benefits of Delta Ponds is food that is plentiful for the wildlife that is found there. I have seen herons catch fish that I thought they couldn't get down. But they did! I could watch the bulge of the fish as it went down through that long neck. This catch is a small one.