Nature - Season 43

Follow filmmaker Vianet Djenguet as he documents a grueling but vital mission to habituate a notoriously protective 500-pound silverback, in a last-ditch effort to save the critically endangered Eastern lowland gorillas from extinction.

Discover the wildlife of Transylvania, a mysterious and secretive region hiding some of Europe's last true wilderness. Its soaring Carpathian Mountains and vast ancient forests still provide sanctuary for some of Europe's most charismatic animals – wolves, bears and lynx. History, folklore and nature create a special blend of wild magic in Transylvania.

Experience San Diego's dazzling biodiversity thriving among a human population of 3.3 million residents. From grebes' intricate rituals to orcas' thrilling hunts, witness nature's resilience and beauty amidst the urban sprawl.

Lion researcher Dr. Philip Stander follows three orphaned desert lion cubs as they navigate the brutal Skeleton Coast of Namibia. Watch the cubs learn to adapt, hunt, and defy the odds of survival in this vast desert territory.

Lion, leopard and cheetah parents attempt to co-exist and raise their cubs on the shores of Botswana's Gomoti River. Narrated by David Oyelowo.

The change of seasons brings turmoil and tough choices to the three big cat families. An aging lion challenges younger rivals, cheetah cubs adjust to life on their own and a leopard mother must balance her children's needs.

Katavi National Park in southern Tanzania is a remote wilderness. Here, NATURE's filmmakers capture a once-in-a-lifetime event – a severe drought followed by heavy rains that tests the survival skills of all those that call Katavi home.

Amid the glamour of Hollywood, a woman finds herself on a transformative journey as she nurtures wounded hummingbirds, unraveling a visually captivating and magical tale of love, fragility, healing, and the delicate beauty in profound acts of kindness.

The walrus is one of the Arctic's most enigmatic animals. With three-foot-long tusks and a droopy mustache, everyone knows what these marine mammals look like, but few ever see them in the wild. For Kirk Johnson, a paleontologist and Sant Director of the Smithsonian National Museum of Natural History, the walrus has been a creature close to his heart for 40 years. Most of the world's walrus, about 250,000 of them, live in the frigid seas between Russia and Alaska. Johnson embarks on an Arctic adventure to uncover the hidden lives of these lumbering giants and the threats they face as climate change shrinks the sea ice. He follows the fate of one young orphan, who is rescued and rehabilitated at the Alaska Sealife Center. What kind of future lies ahead for her and for the walruses in the wild?

A unique, non-invasive, mountain lion study uses a giant network of trail cameras scattered throughout Montana's Sapphire Mountains over a decade to piece together the lives of a female mountain lion called Willow and her kittens. This film weaves clips of mountain lions and their complex interactions with each other and the rest of the forest world into a story about life and death that contains never-before-captured events and behaviors at every turn.

"The Pigeon Hustle" follows in the footsteps of London and New York's pigeon flocks to uncover their secret world. Witness the challenges of city life and how the humble pigeon has overcome them! With a world population hundreds of millions strong, feral pigeons are our most familiar neighbors. They have been an ever-present companion to people for millennia, yet despite such familiarity, there's still so much we don't know about the remarkable, resilient pigeon!

On a remote stretch of Costa Rica's Pacific coast, the lush, volcanic landscape gives way to a startlingly different world: a dry tropical forest – one of the last of its kind on the planet – where a newly resurgent population of jaguars has reclaimed their kingdom. In the waters at its edge, legions of olive ridley sea turtles emerge from the ocean for one of nature's most spectacular events, a mass nesting ritual called the arribada. Here, two unlikely creatures – the sea turtle and the jaguar – meet with spectacular consequences for both their species and the very different environments they inhabit.