How Sloths Defend Themselves

The sloth is the world's slowest mammal, so sedentary that algae grows on its furry coat.

Amazing Facts About the Three Toed Sloth

Sloths are identified by the number of long, prominent claws that they have on each front foot. There are both two-toed and three-toed sloths.
There are four living species of three-toed sloths; these are the brown-throated sloth, the maned sloth, the pale-throated sloth, and the pygmy three-toed sloth which was only recognised as a distinct species in 2001.
The pygmy three-toed sloth can only be found on Isla Escudo de Veraguas which has been separated from mainland Panama for 9,000 years. The major threat to the pygmy three-toed sloth is habitat destruction which is reducing the size of its already small habitat.
Being the world’s slowest mammal, the sloth travels at a top speed of 0.24 kilometres per hour (0.15 mph). They are so sedentary that algae grows on their furry coat.
Sloths make a good habitat for other organisms, and a single sloth may be home to moths, beetles, cockroaches and fungi aswell as algae.
The three-toed sloth is arboreal (tree-dwelling), with a body adapted to hang by its limbs; the large curved claws help the sloth to keep a strong grip on tree branches. It lives high in the canopy but descends once a week to defecate on the forest floor.
Sloths sleep in trees – some 15 to 20 hours every day. Even when awake they often remain motionless.
At night they eat leaves, shoots and fruit from the trees and get almost all of their water from juicy plants.
Dead sloths have been known to retain their grip and remain suspended from a branch
Sloths will move between different trees up to four times a day, although they prefer to keep to a particular type of tree, which varies between individuals, perhaps as a means of allowing multiple sloths to occupy overlapping home ranges without competing with each other.
Although they are quite slow in trees, three-toed sloths are agile swimmers.

Natural camouflage. Sloths possess a symbiotic relationship with the algae that grows on their fur. Sloths have a very unique way of protecting themselves. Firstly, their black, grey fur blends in with the rainfoest, and secondly. They move so slowly that predetors can't see that they're. Sloths are usually docile, relying on their camouflage to protect them from predators. However when threatened, they can use their claws and teeth to defend themselves. Mostly silent, two-toed sloths can make hisses or low moaning cries if they are distressed. Sloths have been reported to survive dramatic injuries.

On land, sloths’ weak hind legs are not very powerful and their long claws are a hindrance. They cannot walk on all four limbs so they must use their front arms and claws to drag themselves across the rain forest floor.
If caught on land, these animals have no chance to evade predators such as big cats and must try to defend themselves by clawing and biting.
In trees the sloth’s greenish color and its sluggish habits provide an effective camouflage; hanging quietly, the sloth resembles a bundle of leaves.
The three-toed sloth, unlike most other mammals, does not fully maintain a constant body temperature, and this limits it to warm environments.
Sloths mate and give birth while hanging in the trees. Females give birth to a single young after a gestation period of around six months.
Three-toed sloth babies are often seen clinging to their mothers — they travel by hanging on to them for the first nine months of their lives.
Once sloth babies are weaned, the mother leaves her home territory to her offspring and moves elsewhere.
Adults are solitary, and mark their territories using anal scent glands and dung middens.
Sloths have extra neck vertebrae that allows them to turn their heads some 270 degrees.
Extinct sloth species include many ground sloths, some of which were as big as elephants.

Photo: www.animalstown.com

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Quick Facts

Type: Mammal
Diet: Herbivore
Lifespan: 25-30 years
Size: 56-60cm
Habitat: Tree dwelling in rain forest
Range: South and Central America
Scientific name: Bradypus

CLASS: Mammalia (Mammals)
ORDER: Pilosa
FAMILY: Megalonychidae
GENUS:Choloepus
SPECIES:hoffmanni (Hoffman's two-toed sloth) and didactylus (Linné's two-toed sloth)

'Leaf it' to the sloth: Thousands of years ago, large ground sloths roamed the United States. They ranged in size from an average-size dog to that of an elephant. These ground sloths had long claws and ate plants. They became extinct about 10,000 years ago. Present-day sloths are much smaller, and live in trees. The anteater is their closest relative.

In a nutshell, sloths are slow-moving, nocturnal creatures that spend almost their entire life upside down in the trees. They eat, sleep, mate, and give birth from this position hanging high among the branches. Sloths are the only mammals whose hair grows in the opposite direction from the hair of other mammals. To accommodate their upside lifestyle, the hair parts in the middle of the belly and grows upward toward the back. The hair on the face points upward, too. This allows water to run off during rainstorms!

Each strand of sloth fur has grooves that collect algae, giving sloths a greenish tint. That helps them blend into the trees they call home. The algae also provides nutrients for the sloth when nibbling on the hair during grooming. The only time sloths descend to the forest floor is to poop, which they do about once a week. To move to a new area of trees, sloths often wait for the forest to flood and then swim to their next home.

Big forest cats like jaguars and ocelots, birds of prey such as harpy eagles, and large snakes like anacondas prey upon sloths. They defend themselves with their sharp claws and teeth. And, if needed, sloths can move quickly through the trees.

If our own body temperature changes more than five degrees, it means we are sick! The two-toed sloth is different. It has the lowest and most variable body temperature of any mammal, ranging from 74 to 92 degrees Fahrenheit (24 to 33 degrees Celsius). If there is a long period of cool, rainy weather, a nursing female can get too cold. This causes the bacteria in her stomach to stop working, so the mother can no longer digest her food. The young continues to nurse as its mother starves to death. This chilling phenomenon is called cold-weather orphan syndrome, as sometimes the youngster falls to the ground and needs to be rescued by humans.

Sloths live in trees in the tropical and cloud forests of Central and South America. Their curved, sharp claws are 3 to 4 inches (8 to 10 centimeters) long. These claws are handy for hanging onto tree branches but make walking on the ground awkward. Yet sloths are great swimmers and can drop from a tree into a river to swim across it while doing the breaststroke! When sleeping, sloths often curl up in a ball in the fork of a tree.

With a muscle mass of only 25 percent (most mammals have twice as much), sloths can’t shiver when it’s cold. But they weigh much less than other animals their size, which is helpful for life in the trees. Sloths can grab the leaves and shoots on high, narrow branches that other animals can’t reach. Two-toed sloths have two toes with claws on the front feet and three toes on the back feet, used to hang upside down from branches. (Three-toed sloths have three toes on their front AND back feet.)

Sloths look like some kind of slow-motion monkey and have long had a reputation for being lazy. The reason they move so slowly has a lot to do with what they eat: a variety of leaves, stems, buds, and some fruit. This kind of diet requires a special digestive system. Sloths have a large, four-chambered stomach, like a cow. Bacteria in their gut help digest the large amount of plant matter they eat. Due to the low nutritional value of their leafy diet, sloths usually move at a leisurely pace and sleep a great deal. They sleep 15 to 18 hours per day and (slowly) look for food at night. Even their innards move slowly, and some food items can take an entire month to digest! This slow metabolism helps sloths survive injuries that would kill other animals.

At the San Diego Zoo, our two-toed sloths eat low-starch, high-fiber biscuits, fresh fruits and veggies, and a variety of fresh browse.

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Sloth romance:These ponderous animals spend most of their time alone. But when a female is ready to breed, she lets out a nighttime “scream” that alerts any interested males. If more than one male reaches her at the same time, they slowly fight each other while hanging by their rear legs! Winner takes all, and several months later, the female gives birth (while upside down) to a single offspring.

The youngster must grab onto its mother's hair at birth and find its way to her nipples to nurse. The mother's body position looks like a comfortable hammock of sorts as baby rests on her chest. The baby begins sampling solid foods at about 10 days but still nurses for about a month. After that, the youngster continues to cling to its mother’s belly but eats whatever she eats. It first hangs upside down on its own at 20 to 25 days.

The sloth youngster stays with its mother for six months to two years, depending on the subspecies. It then “branches off” to live on its own. The young inherits a part of the home range left vacant by the mother, as well as her taste for certain leaves. Several sloths can live in a similar home range without competing for food or space.

A sloth’s voice sounds like the hiss of a deflating balloon, but the animal can also squeal and grunt as needed. A low bleat signals distress—sloth ears are most tuned to low-frequency sounds. The sloth has an excellent sense of smell. Males scent mark on tree branches from a gland on the rump.

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We exhibited two-toed sloths in our early years, but without much success. In the early 1930s, we managed to keep a mother and her baby alive for three years.

Today, we have several Linné’s two-toed sloths at the Zoo and the Safari Park, serving as animal ambassadors for their species. Xena, born at the Zoo in 2013, meets guests up close during special animal presentations—and occasionally she is joined by her new baby, born in April 2019. The baby's father is another animal ambassador—a handsome male sloth named Brad Pitt.

How Sloths Defend Themselves Predators

Though not uncommon in the wild, deforestation and other forms of habitat destruction remain threats for the sloth.Other human-made threats include power lines and roads. Educating children and adults in the sloths’ home countries about the animals' importance to the ecosystem—and how to treat sloths respectfully—remains a challenge for those who want to help this unique and wonderful animal.

How Do Sloths Protect Themselves In The Wild

Both two-toed sloth species live in zoos. Yet identifying the two has always been problematic—they look alike! Based on the genetic information, a senior research associate in our Genetics Division designed a low-cost, easy-to-use genetic tool to identify two-toed sloths and improve management of the captive population. This tool allows visualizing DNA differences between species in a polymer matrix, a procedure that uses non-sophisticated tools in simple laboratory settings.

Sloth Protecting Themselves

You can help us bring sloths and other species back from the brink by supporting the San Diego Zoo Global Wildlife Conservancy. Together we can save and protect wildlife around the globe.