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Sloths can be 60 to 80 cm (24 to 31 in) long and, depending on the species, weigh from 3.6 to 7.7 kg (7.9 to 17.0 lb). Two-toed sloths are slightly larger than three-toed sloths. [22] Sloths have long limbs and rounded heads with tiny ears. Three-toed sloths also have stubby tails about 5 to 6 cm (2.0 to 2.4 in) long.
Three-toed sloth crossing a road in Alajuela, Costa Rica. Members of this genus tend to live around 25 to 30 years, reaching sexual maturity at three to five years of age. Three-toed sloths do not have a mating season but breed year-round. Male three-toed sloths are attracted to females in estrus by their
Hoffmann's two-toed sloth climbing in a cage at Ueno Zoo (video) The Hoffmann's two-toed sloth (Choloepus hoffmanni), also known as the northern two-toed sloth, is a species of sloth from Central and South America. It is a solitary, largely nocturnal and arboreal animal, found in mature and secondary rainforests and deciduous forests.
Tree sloths: Medium-sized folivores specialized for life hanging upside-down in trees; Ground sloths: Medium to very large ground-living herbivores (and possibly omnivores) Aquatic sloths: Thalassocnus, a medium-sized herbivore, is the only known aquatic sloth
Ground sloths are a diverse group of extinct sloths in the mammalian superorder Xenarthra. They varied widely in size with the largest, belonging to genera Lestodon, Eremotherium and Megatherium, being around the size of elephants. Ground sloths represent a paraphyletic group, as living tree sloths are thought to have evolved from ground sloth ...
Based on the morphological comparisons, it was thought the two-toed sloths nested phylogenetically within one of the divisions of Caribbean sloths. [11] Though data has been collected on over 33 different species of sloths by analyzing bone structures, many of the relationships between clades on a phylogenetic tree were unclear. [12]
The pygmy three-toed sloth, like others in its genus, is an arboreal (tree-living) animal. This sloth can spend as many as 15 to 20 hours per day on trees. It moves at an extremely slow speed of 0.24 kilometres per hour (0.15 mph), making it one of the slowest animals. [18]
A morphological tree of Megalonychidae, based on the work of Stinnesbeck and colleagues (2021). [15] ( Note that this tree does not conform to genetic studies, as it includes the Caribbean sloths Neocnus, Parocnus Megalocnus and Arcatocnus which have been placed in the separate family Megalocnidae, well as the two toed sloths (Choloepus), which are placed in the clade Mylodontoidea).