Female pygmy three-toed sloths signal it’s time to mate by letting out a scream. If there’s a competition between another potential suitor, then it’s game on. The two males will battle for her affection by hanging from branches by their feet and pawing at each other. Grab a mate and explore the world’s creatures with the BBC’s natural history collection, available now on discovery . Start streaming here: http://discoverypl.us/2X8jmak #discoveryplus | Discovery