This purple squirrel has been hanging around Meoncross School in Stubbington, England. Nobody is quite sure where it's unusual fur color comes from, but the school's registrar Lorraine Orridge has a suspicion. From The Telegraph:

"We don't think he is a mutant squirrel but he may have had a mishap around the school. "The old building where we have seen him nipping in and out is a bit of a graveyard for computer printers. He may have found some printer toners in there.

Purple squirrel baffles experts