That’s hysterical! I don’t know where you live, but all we ever saw in East TX was Cattle Egrets. We had a nice koi pond (19 ft, waterfall—hubby did a beautiful job) with 4 large koi. I worried about birds, some people in the area had trouble with them, but I never saw anything that was big enough to get them. Out here, I suspect they would disappear right away, so we don’t have a pond. I miss it!
I have found a couple of my Comets lying in the grass yards away from the pond.
Rather than fish-suicide, I kinda suspect that whatever had grabbed them got spooked by noises from the dogs inside the house and dropped them before flying off.
Coons or cats would have taken them away.
[neither of them seem to like the fake ‘gator, either]...:)