what makes the two toed sloth different
1 Two-toed and three-toed sloths were formerly placed in the same family but the two genera have profound behavioral and anatomical differences and are believed to come from two different fossil lineages. 2  They are now placed in separate families. 3  2-toed is larger, faster, and nocturnal. Long limbs â forelegs only slightly longer than hind legs (3-toed sloth's forelegs are 35% longer than hind legs). 2  Two-toed sloths have hands with two functioning fingers with sharp claws 76 - 102 mm (3 - 4 inches). 3  Three-toed sloths have three fingers on their hands. 4  Three claws on hind limbs.
1 Besides the fact that one has two toes on its forelimbs and the other three, they have different numbers of vertebrae (three-toed ones have nine; two-toed ones have six or seven). 2  Also, Three-toed sloths have a small tail and its forelegs are substantially longer than the rear ones.ifference Between Two and Three Toed Sloths: 1  Besides the fact that one has two toes on its forelimbs and the other three, they have different numbers of vertebrae (three-toed ones have nine; two-toed ones have six or seven).
The two-toed sloth is slightly bigger than the three-toed sloth, though they share many of the same features. They are about the size of a medium-sized dog at around 23 to 27 inches (58 to 68 cm) and 17.5 to 18.75 pounds (about 8 kilograms).he two-toed sloth is slightly bigger than the three-toed sloth, though they share many of the same features. They are about the size of a medium-sized dog at around 23 to 27 inches (58 to 68 cm) and 17.5 to 18.75 pounds (about 8 kilograms).