What is this?

[Little Bear]

This white animal is living in a tree at my house. Looks like an albino, but not sure what? My best guess is a porcupine, but expert opinions are welcome.

[Lakesrider]

Looks like a white porcupine....Or a white squirrel? :confused:

http://www.tomsterlingfilms.com/photos/12_white_porcupine.jpg