Mammals
What animal sleeps 15 hours a day, hangs upside down from trees, and moves so slowly that algae grows on its fur? It's the sloth! These adorable, slow-moving mammals live in the rainforests of Central and South America. Sloths spend almost their entire lives hanging from tree branches. They eat, sleep, and even have babies while upside down! Despite being the slowest mammals on Earth, sloths are perfectly designed for their treetop lifestyle. Let's learn all about these amazing creatures!
Sloths have round faces with small ears and a permanent smile! Their faces look like they're always happy. Sloths have thick, coarse fur that's usually brown or gray. Their fur often has a greenish tint because of the algae that grows on it! Sloths have long arms, curved claws, and short, stubby tails. Their eyes are small and their noses are flat!
There are two main types of sloths: two-toed and three-toed! Three-toed sloths have three claws on each hand. Two-toed sloths have two claws on their front hands and three on their back feet. Two-toed sloths are a bit larger and more active at night. Three-toed sloths are smaller and active during the day. Both types have incredibly strong grip strength!
Sloth fur grows in the opposite direction from most mammals! On most animals, fur grows from the back toward the belly. Sloth fur grows from the belly toward the back. This makes sense because sloths hang upside down. When it rains, the water runs off their fur instead of soaking in. Their fur also has special grooves where algae, moths, and beetles live. A single sloth can host an entire tiny ecosystem!
Sloths live in tropical rainforests of Central and South America! You'll find them in countries like Costa Rica, Panama, Brazil, and Colombia. They live in the tall trees of the rainforest canopy. Sloths prefer trees with lots of leaves, especially cecropia trees. They spend nearly their whole lives high up in the branches, rarely coming down to the ground!
Each sloth has a home range of several trees! They move between their favorite trees slowly, spending a day or two in each one. Sloths know which trees have the best leaves for eating. They follow the same routes through the canopy over and over. A sloth might spend its whole life in an area the size of a few football fields!
Sloths come down to the ground for only one reason-to go to the bathroom! About once a week, sloths climb down to the base of a tree. They dig a small hole, do their business, and cover it up. Then they climb back up. This weekly trip is the most dangerous part of a sloth's life. On the ground, they can barely walk. They drag themselves with their front claws!
Sloths eat leaves, buds, and tender twigs! They're herbivores with a very simple diet. Three-toed sloths are picky eaters that prefer leaves from just a few tree species. Two-toed sloths eat a wider variety of leaves, fruits, and even some flowers. Sloths reach out with their long arms to grab branches and pull leaves to their mouths!
Sloths have a very slow digestive system! It can take an entire month for a sloth to digest one meal. Their stomachs have multiple chambers, similar to cows. The bacteria in their stomachs slowly break down the tough leaves. Because leaves don't have much energy, sloths don't get a lot of calories. This is one reason they move so slowly-they save energy!
Baby sloths learn what to eat by watching their mothers! Mothers chew leaves and let babies lick their lips to taste them. This teaches babies which leaves are safe and nutritious. Sloths also get water from the leaves they eat and by licking dew and raindrops from leaves. They rarely need to drink water separately. The rainforest provides everything they need!
Mother sloths give birth to one baby at a time while hanging upside down! The newborn baby grabs onto its mother's fur immediately. Baby sloths cling to their mother's belly for the first several weeks of life. They hold on with a powerful grip even while the mother moves and sleeps. The baby rides everywhere the mother goes!
Baby sloths are born with their eyes open and a full coat of fur! Newborns weigh about 10 to 12 ounces. They're already equipped with small claws for gripping. For the first few weeks, babies nurse their mother's milk while hanging on. They start tasting leaves at about 2 weeks old by licking their mother's mouth. This is how they learn which leaves are safe to eat!
Young sloths stay with their mothers for about 6 months to a year! During this time, they learn which trees to climb, which leaves to eat, and how to move through the canopy. When it's time for the baby to become independent, the mother doesn't leave. Instead, she gives her baby her favorite tree and moves to a new territory! What a generous mom!
Baby sloths face dangers from eagles, snakes, and jaguars! Their best defense is staying still and hidden against their mother's body. As they grow, young sloths develop the algae-covered fur that provides camouflage. By the time they're on their own, they've learned all the survival skills they need. Young sloths can live 20 to 30 years in the wild!
Sloths prove that you don't have to be fast to be successful! While most animals survive by being quick, sloths survive by being slow and hidden. Their strategy of moving slowly, blending in, and saving energy has worked for a very long time. Sloths teach us that there's more than one way to succeed in life!
These gentle animals are incredibly important to their rainforest homes! The algae, moths, and beetles living in sloth fur create a unique mini-ecosystem. When sloths come down to go to the bathroom, they fertilize the trees they live in. Sloths also provide food for harpy eagles and other predators. They're connected to the whole rainforest food web!
Sloths face threats from habitat loss! Rainforest destruction removes the trees sloths depend on. Power lines and roads are dangerous for animals that move slowly. Rescue centers in Costa Rica and other countries help orphaned and injured sloths. Many people are working to protect sloth habitats and the rainforests they call home!
Sloths have become some of the most beloved animals on the planet! Their smiling faces and gentle nature make people smile. Videos of sloths crossing roads or hugging stuffed animals have charmed millions. Sloths remind us to slow down sometimes and enjoy life at a calmer pace. In a busy world, sloths show us that there's real wisdom in taking things slow!