Wandering around The Wildlife Trust's nature reserve at Cambourne the other morning I spotted a black squirrel. It was hunting through the leaves for nuts alongside the more common greys. On posting the photos on a wildlife group later that day it appears many people didn't know black squirrels were even a thing! I know they are seen fairly often in Cambridgeshire, my friend had one in her garden a few years ago and one village has more blacks than greys. They are actually the same species but with a mutant gene in their coat pigmentation.