The sloth does not hear well,but it has keen senses of smell and touch, which it depends on to find food. The sloth also has very good eyesight and it can turn its flexible neck far to each side so that it can see it almost every direction. All sloths have three toes on each hind foot. But the number of toes on their front feet varies. The number of claws on each front foot makes it easy to distinguish the animal from its two-toed relative.
Sloths live alone or occasionally in pairs.
A female sloth gives birth to one offspring a year. The newborn sloth has tiny claws, which it uses to climb onto its mother's belly soon after birth. For about a month, it clings to her long hair. Then it begins to move about by itself. When the young sloth is about nine months old, the mother forces it to go off on its own.