The largest animals in the world are some of ... U.S. Bison can be seen in various places in the wild in North America, especially in US national parks, and are often found in large herds.

The playful North American river otter is equally at home in the water and on land. It makes its home in a burrow near the water's edge, and can thrive in river, lake, swamp, or estuary ecosystems.

This makes the mule deer a purely North American big-game animal that has been shaped and forged by the rugged mountains, plains, and deserts of the West. Because of the harshness of these ...

Once the most abundant and widespread frog species in North America, leopard frogs were widely collected not only for dissection but for the food industry (frog legs) as well. However, massive ...

Horses first evolved in North America. Some of their early ancestors ... which looped over the animal’s lower jaw. This incredible petroglyph comes from Comanche National Grassland near Colorado’s ...

Because of their size, they ambushed their prey, working together to bring down an animal once they had a hold of it. It's thought that dire wolves evolved in South America and ventured north, ...