How the North American grey squirrel has displaced the native red squirrel in the UK.

This just reminded me of a time I was living in England in the late 90s, and a group of friends and I had found an injured grey squirrel. We called animal control for help, and their response was that if we decide to officially report it, they would have to put it down, because it's considered an invasive species. We ended up just letting the squirrel go, sorry England, for making your map just a tiny bit more grey.