Jungles and rainforests are home to an incredible variety of species like preening birds, intelligent orangutans and remarkable ambitious ants.

Cameras follow desert elephants seeking sustenance, bison roaming North America grasslands and caterpillars living the good life underground.

Venture into the deep, dark and desolate oceans that are home to an abundance of beautiful -- and downright strange -- creatures.

The need for fresh water is as strong as ever. However, the supply is becoming increasingly unpredictable for all manner of species.

Examine the fragile interdependence that exists between forests' wide variety of residents, including bald eagles, hunting dogs and Siberian tigers.