The armadillos have scaly skin for protection; some have also the power of rolling themselves into a ball, still further securing safety.

Armadillo

The armadillos have scaly skin for protection; some have also the power of rolling themselves into a…

The limbs are short and strong, as are also the claws , and the animals have a great aptitude for digging and burrowing.

Armadillo

The limbs are short and strong, as are also the claws , and the animals have a great aptitude for digging…

This is a skeleton of the Megatherium. Megatheria were a group of elephant-sized ground sloths that lived from 2 million to 8,000 years ago. Their smaller ground sloth cousins were the Mylodon.

Megatherium

This is a skeleton of the Megatherium. Megatheria were a group of elephant-sized ground sloths that…

The fossilized skeleton of a Megatherium.

Fossil Megatherium

The fossilized skeleton of a Megatherium.

The sloth differs from all other arboreal four-legged mammals in its manner of climbing. It always has its back downward. It eats leaves and moves very slowly and deliberately.

Sloth

The sloth differs from all other arboreal four-legged mammals in its manner of climbing. It always has…

A genus of mammals belonging to the bear family. They are native to Central and South America. These animals are peculiar for their long claws, which turn toward the body, thus making it difficult to move on the ground, but they pass to and fro with remarkable favility on the limbs of trees.

Sloth

A genus of mammals belonging to the bear family. They are native to Central and South America. These…

"Skull of two-toed sloth." —The Encyclopedia Britannica, 1903

Sloth Skull

"Skull of two-toed sloth." —The Encyclopedia Britannica, 1903

"Sloth is the popular name for any individual of the Edentate group Tardigrada, from their slow and awkward movements on the ground, owing to the peculiar structure of the wrist and ankle joints. The feet are armed with long claws, and turned toward the body, so that the animal is compelled to rest on the side of the hind foot, while the disproportionate length of the fore-limbs causes it to rest also on the elbows. It shuffles forward, alternately stretching the fore legs and hooking the claws into the ground, or grasping some object to draw itself along. Sloths are natives of South America, nocturnal in habit, and are found in the forests of that region, passing their lives among the branches of trees, on the leaves and young shoots of which they feed."—(Charles Leonard-Stuart, 1911)

Giant Sloth

"Sloth is the popular name for any individual of the Edentate group Tardigrada, from their slow and…