What Kind of Animal Is a Sloth? An Article to Help You Understand Sloths

The sloth is a general term for animals in the suborder Folivora under the order Pilosa in the class Mammalia, with a total of 2 families, 2 genera, and 6 species. It is named for its slow movements and its habit of hanging upside down from tree branches with its claws for hours without moving. It is the only wild animal that has plants growing on its body. Its overall fur color is grayish-brown, but it appears green because algae attach to its fur. Most species breed in spring, and the gestation period varies by species, lasting 4 to 6 months or 9 months, with 1 offspring per litter. Lifespan varies, and some species live up to 11 years.

Although sloths have feet, they cannot walk, and rely on their forelimbs to drag their bodies forward. Their fur is fluffy, long, and thick. The head is short and round, the ears are small and hidden in the fur, and the tail is short. The forelimbs have 3 fingers and the hind limbs have 3 toes, all with curved sharp claws. The forelimbs are longer than the hind limbs. The upper jaw has 5 pairs of teeth and the lower jaw has 4 pairs, for a total of 18. The stomach is divided into several chambers, and there are 9 cervical vertebrae, the most among mammals. Body weight is 4 to 7 kg, and the body hair is long and coarse, with the fur providing living conditions for algae.

Sloths are strictly arboreal and purely herbivorous, mainly eating leaves, tender buds, and fruits. For sloths, the best food is low-calorie leaves, and eating a little requires several hours to digest. When full, they hang upside down on tree branches and laze around. It can be said that they make trees their home and rarely go down to the ground. They rely on hugging tree branches, climbing upward with their bodies upright, or hanging upside down and moving forward by alternating their limbs. They can hang upside down for long periods, and even sleep in this posture.

Sloths are distributed in Central America and South America, including Venezuela, Guyana, Colombia, Ecuador, Peru, Brazil, Honduras, Nicaragua, Costa Rica, Panama, Venezuela, Bolivia, Guyana, Suriname, French Guiana, and other places. There are a total of 2 families, 2 genera, and 6 species, all listed in the International Union for Conservation of Nature (IUCN) 2012 Red List of Threatened Species ver3.1——Critically Endangered (CR).

The sloth is an unusually lazy mammal. It is too lazy to do anything, even too lazy to eat, too lazy to play, and even when being chased or captured, it seems as if nothing is happening, crawling slowly. When facing danger, its escape speed does not exceed 0.2 m/s. People often compare slow movement to a turtle crawling, but in fact sloths crawl even more slowly than turtles.