1. Although sloths have a reputation for being slow and lazy, they only sleep around ten hours a day. Flickr: iamrandygirl 2. Their predators are eagles, snakes, and jaguars, but they're well protected because they spend most of their time in trees. Flickr: marika 3. Sloths are either two-toed or three-toed, but the two-toed sloths are a little bigger. Flickr: alumroot 4. Their diet is mostly leaves, so they don't get much nutrition. This is why sloths move so slowly, to conserve energy. Flickr: ejorpin 5. When a female is ready to mate, she lets out a scream to alert the males in her area. The eligible sloth bachelors then make their way to the sound of the screams. Flickr: vmabney 6. Baby sloths hang onto their mom's belly for the first couple of weeks, and they stay by their mom's side for up to four years. Flickr: 52635763@N08 7. Algae grows on sloths' fur, which helps disguise them from predators. Flickr: thowra 8. Sloths only come down from the trees to urinate and defecate, and they always go to the same exact spot. This only happens once a week. Flickr: pierre_pouliquin 9. They are arboreal animals, which means they live and spend almost their entire lives in trees. Flickr: marthaenpiet 10. Sloths live in the tropical forests of Central and South America. Flickr: briangratwicke 11. Three-toed sloths can turn their heads almost all the way around! Flickr: mstrniste 12. Even though they look more like monkeys, sloths are related to anteaters and armadillos. Flickr: adamnewulm 13. The pygmy three-toed sloth is critically endangered and they are found only on a small island off the coast of Panama, called Isla Escudo de Veraguas. youtube.com 14. Two-toed sloths are nocturnal, while three-toed sloths are diurnal, which means they're active during the day. Flickr: sdelgado 15. Extinct species of sloths were as large as elephants. Flickr: ekilby 16. Sloths have a very slow-moving digestive system and sometimes it can take up to a month for them to digest a meal. Flickr: ekilby 17. Sloths are surprisingly excellent swimmers! Just look at this lil' guy go! Flickr: lost_archetype Check out the World Wildlife Foundation for more information on sloths and how you can help them.