Many birds and other animals do not like to live in just one spot.

The quagga mussel, along with the similar zebra mussel, are considered invasive species.

Around the world, frogs are in trouble.

Biologists have noticed that as win- ter arrives, some animals start to act differently.

By now, most of the breeding bald eagles found in Arizona have returned to their nests and laid eggs for this year.

Using field guides or the Internet, study different birds.

Animal sign not only shows us an animal has been here, but also tells us a little about the animal.

To manage wildlife successfully, we rely on science. We use scientific methods to study the animals.

Seventy-five years ago, archaeologists made an exciting discovery. On the edge of the Gila River, near where Interstate 10 now runs, they found the remains of a long-forgotten Hohokam town.

John Muir, well-known author and naturalist, once wrote, “Tug on anything at all and you’ll find it connected to everything else in the universe.” But what did he mean? 

Do you like animals and hope to work with them in the future as a veterinarian?

John Wesley Powell, a geology teacher who lost an arm in a Civil War battle, had become enchanted with the wild rivers of the western United States.