Almost all mammals have seven cervical vertebrae (the bones in the neck); manatees have six, two-toed sloths have five and three-toed sloths have nine. They also have no gall-bladder nor appendix, and cannot regulate their body temperature. Their teeth all look like molars, with no incisors. Throughout their Central and South American range, they live entirely upon leaves. Because the DWA provides a constant supply of Cecropia leaves, our male, “Leno”, has thrived here since 2005, setting the captive age record outside of Tropical America.