I have never seen a zoo where sun bears have live trees to climb. That is fantastic.
And since I am also a photo instructor at my local photo lab, I must point out that situations like this are where you need to learn to switch your lens from autofocus to manual focus (since the auto will lock on whatever is closest - in this case the leaves). Just some friendly advice - please don't take offense, it's still a great shot and thanks for sharing it.