It's not the most creative source, given, but google is regardless a great source of inspiration, especially when it comes to image search. It's so easy just to plug an animal in and get sketching.
Running with the current illustration bang, I've gone ahead and made another. This one took around two hours.
It's a rather guilty looking raccoon looking like it's really sorry it just ate all those berries from your garden.
Plus à venir. Enjoy.