We hand-fed some raccoons at a campground a few years back...probably not the best thing to do but they seemed to know their way around and who would give them food; as soon as we stopped, they moved on to the next site.
I don't feed deer or bear or cougar...at least not intentionally. It seems like every week on the news, there's some bear getting shot because they became habituated to human food (garbage) that wasn't stored properly.
I don't install bat-houses because my brother had a few dozen families move into his attic one year and it was hell to get rid of them....they really make a mess!
I like watching the hummingbirds...sweet little things!