Hmm, that’s a tough one. I’m going to have to say Moon Bears. I’d never really heard of them before researching them but there are so many odd things about them that are fascinating – specifically their very strangely shaped bodies (which are close to what we think ancestral bears looked like) and the fact that they’re arboreal, which means they are adapted to climbing and spending time in trees.
Seeing a full grown fat bear on top of a tree is the strangest sight I’ve ever seen as a researcher!
There are so many it’s hard to pick just one. I’d go with bushbaby probably! These are one of the smallest primate species alive and they are nocturnal (live by night). They have the funniest face, with big eyes and big ears and jump from branch to branch. While I was studying baboons in South Africa, a bushbaby got hurt and they brought it to us and we took care of it for a while before releasing it again in the wild. It had seen every corner of the house by that time!