If Cryptozoology is the study of creatures that may or may not exist, I offer this; a hypothetical drawing of the squirrel OR SQUIRRELS living in my attic.
Let's start with the facts. I know they're up there... and I just KNOW they're going through all my stuff, playing with my old toys, wearing my old t-shirts, wearing out our Christmas lights and making one hell of a lot of noise.
And I KNOW they're red squirrels, too! I've chased them in the backyard. Little bastards...