The Hoffman's two-toed sloth is one of the world's slowest mammals—so sedentary that algae grows on its furry coat. The plant gives it a greenish tint that is useful camouflage in the trees of ...

Most sloths are listed as least concern on the IUCN redlist of threatened species. But threats in the form of some of the habitat loss and fragmentation and the illegal wildlife trade still exist. At ...