1. Islands

While some creatures enjoy a peaceful life on the islands, others fight for survival from birth.

2. Mountains

From snow leopards to grizzly bears, the secret lives of mountain creatures are revealed.

3. Jungles

Jungles are home to animals attempting to survive in the most competitive place on Earth.

4. Deserts

Animals battle hostile conditions in an attempt to survive life in the desert.

5. Grasslands

Animals endure the most hostile seasonal changes on the planet to survive in the grasslands.

6. Cities

While cities may seem an unlikely place for animals to thrive, they can be a world of opportunity.