Ok, this is probably a shot in the dark, but...

The mounted squirrel head reminds me of this Saturday Night Live skit of a game hunter and his ever-decreasing collection of stuffed moose. One of the heads on the wall is a rat with a tiny pair of antlers stapled to its head. He even has a microscope on the wall with moose DNA in it.

Does anybody else remember this sketch? I think it was with Christopher Walken.