National Geographic photographer Steve Winter, who has spent his life working to save endangered big cats through his award-winning pictures, now turns his lens on an elusive and deadly predator - the leopard.

National Geographic photojournalist Tim Laman reveals new threats to wild orangutans.

Conservationists work to save Borneo's last Sumatran rhinos.

Put up your dukes -- er, paws -- and prepare to discover epic, bone-shattering clashes between some of the world's deadliest predators. From lions, tigers and bears to meerkats, mongoose and mice, the series features testosterone-induced battles between some of the biggest, baddest and often surprising fighters in the animal kingdom, revealing the extraordinary motivations and strategies that fuel each incredible brawl.

The isolated Galapagos Islands, 600 miles off the coast of Ecuador, are home to species that have changed the understanding of the world.

"Move as millions. Survive as one." That's the catchphrase of this seven-part event for which a National Geographic team spent two-plus years recording across 20 countries and all seven continents. Narrated by Alec Baldwin, it tells the stories of many of the planet's species and the journeys they undertake to ensure their survival. The diverse range of animals shown -- many revealing behaviors never caught on film before -- include Botswana zebras, Mali elephants, flying foxes in Australia, Pacific white sharks, and the white-eared kob of the Sudan, thought to have been destroyed during decades of violence.

Documenting the daily lives of some of the planet's most extraordinary animals.

Actor James Norton narrates a series exploring America's iconic Wild West, known for its legends and synonymous with Hollywood productions. Miles of desert landscapes, redwood forests and extreme coastlines make up the topography, shaping the lives of the wildlife and inhabitants of the area. Filmed over a two-year period, the camerapeople use the latest technology to capture the location from land, air and sea. Episodes discover the animals and plants that have adapted to life on the sand dunes, including mustangs, coyotes, desert tortoises and cacti.

Dr. Brady Barr travels to remote regions in search of the most feared creatures in the world.

Dr. Brady Barr, a herpetologist by trade, travels all over the world to study reptiles and other creatures in their native habitats, often risking his life in the process. His mission is two-fold: to collect as much information as possible about the animals he studies and to inform the public about the state of the planet and the risk of extinction many animal species face. And, of course, there's another benefit to all his work: It makes great TV.

From the frozen tundra in the north to the dry forests of the equator, Sir David Attenborough narrates a compelling view of the planet. "Planet Earth" was the first natural history documentary to be filmed in high definition, and now a decade later improved technology has made it possible to capture further details, from elusive animal behaviors to previously inaccessible remote landscapes. In addition to exploring the wilderness, the series examines urban dwellings, focusing on animals that have adapted to city life.

Nigel Marven journeys to the Colombia's major habitats to meet rare and unusual creatures.