Let’s explore the 21 deadliest animals in North America, each with its own unique capabilities to strike fear into the hearts ...

There are over 150 different species of firefly in North America, and each has its own characteristic flash code. Male fireflies use their glow to attract females and, in some areas at certain ...

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.

There are about 50 species of flying squirrels ranging across most of North America down into Central America, and stretching from Southeast and Northern Asia into Siberia and Scandinavia.

Ornithologist Bruce Beehler tracks down what he calls the “Magnificent Seven,” a charismatic group of migratory birds, in his ...

Bears can be found in many different climates all over the world. Brown bears are found in more places than any other bear species. They live in northwestern North America, Europe and parts of Asia.

But humans living in ice age North America had to deal with the real thing. Dire wolves (Canis dirus) were a canine species that hunted the plains and forests. They were similar to modern grey ...

North American species like the Colorado potato beetle and the fall armyworm have become invasive elsewhere. Illustration by Marilyn Foehrenbach Q: In North America, we worry about invasive ...

The U.S. Fish and Wildlife Service plans to add the butterfly to the threatened species list by the end of next year ...

Brown bears are found in more places than any other bear species. They live in northwestern North America, Europe and parts of Asia. American black bears live only in North America, and spectacled ...