I knew that herons took fish from ornamental ponds but when we reurned from a morning out and saw that 20 fish were gone and one big fat fish was stranded next to the pond, I thought that was too much for a heron to manage right next to a busyish street.
So I called the police and reported fish thieves, then phoned my fish-loving DH at work.
Huge row followed -- him thinking that we should lock the gates at all time to keep out thieving yobs and me thinking that we should risk the odd theft rather than be so anti-social.
I hang up, start to doubt that thieving yobs would operate in broad daylight and only nick small cheap fish rather than large expensive ones. I do a little online research and discover that our little crime scene bears all the hallmarks of heron attack. They are especially likely to skewer big fish and then fail to cram them down their greedy throats, so leaving them at side of pond.
Marriage saved.
(Don't really want to shoot them, with their cute pterodactyl lurchings across the sky. But still, bastards, eh?)