National Geographic Wild HD

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In the African desert country of Mali, rare desert elephants must migrate for food and water.

Liz Bonnin travels to Africa's Kalahari Desert to witness the teamwork of meerkats and to the beaches of Mexico as sea turtles hatch in unison.

Filmmaker Bertie Gregory travels to the North and South Poles to film wildlife.

Bertie's mission takes him to Tanzania to film cheetahs on the hunt.

Bertie is in the Azores to film a spectacular predator feeding frenzy.

Learning how a population of bowhead whales, once hunted almost to extinction, is faring today; the team is the first to observe the feeding strategies of the deep-sea Greenland shark, an animal that can live for more than 400 years.

The team's mission is to figure out if Svalbard's polar bears are adapting to their environment; they face this giant of the Arctic Ocean and scale a glacier to learn how much time is left for one of the most critical habitats for polar bears.

The team is in the crystal-clear waters of Bimini in the Bahamas to witness the incredible journey of the great hammerhead shark; as the team follows the shark's migration, they discover the secrets of how these animals navigate the vast ocean.

The team is in the Azores to tag the sixgill shark and learn more about its nightly patterns hunting for food in the abyss; the team tags and retrieves valuable data, uncovering why this shark undertakes its epic journey from the depths at night.

In the Azores, the team follows the elusive sperm whales to their hunting grounds a mile beneath the surface, where they discover the secret lives of these deep-diving whales.

The team travels to the Dominican Republic in the Caribbean to reveal the greatest secrets in the lives of the North Atlantic humpback whale; they witness a mother defend her calf in the ultimate ocean battle with a pack of orcas.

Residents tackle repairs and community duties as the mild winter comes to an end.

Port Protection residents combat unpredictable weather as a strange winter comes to a close.

Residents take advantage of warm winter weather to complete essential chores.

The residents of Port Protection work together to make improvements in their community.

As the Arctic winter approaches, residents of Port Protection must survive at all costs.

Danger lurks around every corner for Port Protection residents; Mary Miller hunts deer while being menaced by wolves; Curly Leach contends with grueling weather; Gary Muehlberger faces violent seas to fill his freezer with fish.

In Port Protection, learning to live alongside Mother Nature is the only way to survive.

As residents of Port Protection prepare for winter, old tools and new skills are vital.

An eel has anemia; a hippo visits the dentist; a tortoise moves in.