Although unable to survive outside the tropical rainforests of South and Central America, within that environment sloths are outstandingly successful creatures. They can account for as much as half the total energy consumption and two-thirds of the total terrestrial mammalian biomass in some areas. Of the six species, only one, the Maned Three-toed Sloth, has a classification of ‘endangered’ at present. The ongoing destruction of South Americas forests, however, may soon prove a threat to the others.
