A brown-throated sloth (<i>Bradypus variegatus</i>) photographed at PanAmerican Conservation Association in Gamboa, Panama
A brown-throated sloth (Bradypus variegatus) photographed at PanAmerican Conservation Association in Gamboa, Panama
Photograph by Joel Sartore, National Geographic Photo Ark

Three-Toed Sloths

The sloth is the world's slowest mammal, so sedentary that algae grows on its furry coat. The plant gives it a greenish tint that is useful camouflage in the trees of its Central and South American rain forest home.

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.

All sloths are built for life in the treetops. They spend nearly all of their time aloft, hanging from branches with a powerful grip aided by their long claws. (Dead sloths have been known to retain their grip and remain suspended from a branch.) Sloths even sleep in trees, and they sleep a lot—some 15 to 20 hours every

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