For 2 days now, in the morning and night, I hear clawing and running around in the wall. The wall is only about 8 inches wide since one side belongs to the living room and the room I am in now. It only stays at the very end, and it wont try running down it for some reason. What animal could it be? I think maybe a squirrel or rat, but it sometimes sounds as if it has wings and is trying to fly around, but probably not. It cant be a possum though. That thing is pretty annoying and it makes me wonder how many other animals, or dead, that are in the walls. That's not good. Id like to borrow an infared scanning thing and see on a screen what could be there. What other animals could it be?