This sexy beast is a thee-toed sloth. It graced my presence in a place called Pavones in south western Costa Rica, not too far from the Panama border. Sloths move so slow that algae easily grows on their fur (moths also like to live in there). The algae shares a symbiotic relationship with the sloth — the sloth providing a home for the algae and the algae providing camouflage for the sloth.