Scientists and bee experts discuss the crucial role that honeybees, a "keystone species," play in our economy and ecosystems, as well as bees' fascinating social organization and what we can do to reverse the decline of nature's pollinators.

This pledge period special airs throughout December, 2014 and contains segments from 16 of Nature's films about birds.

Join Lisa Dabek and her team with Woodland Park Zoo’s Tree Kangaroo Conservation Program as they journey into the remote cloud forests of Papua New Guinea. Meet one of the most elusive creatures you will ever see in the wild – the Matschie’s tree kangaroo. See how the local people are helping to protect this rare marsupial and its forest home.

Biologist Jack Hogg has been studying a herd of wild bighorn sheep on Montana’s National Bison Range for more than 35 years. When Jack’s herd gets infected with a deadly form of pneumonia, he goes in search of answers.

In the frigid Indian Himalayas, people manage to eke out a living alongside one of Asia’s most elusive cats: the snow leopard. Today there may be as few as 4,000 of these great cats remaining in the wild, and with the snow leopards‘ prey in decline, encounters between herders and the cat are on the rise. Explore this fragile relationship through the eyes of Tashi, a local goat herder, and learn how his village has partnered with the Snow Leopard Trust to find ways to both live with and save one of the rarest cats on Earth.

Sit back, relax, and experience the animals, landscapes, and awe of Yellowstone National Park in winter.

New York Harbor was a haven of incredible underwater biodiversity—until centuries of pollution turned it into a cesspool. Today, an alliance of architects, restaurateurs, scientists, and high school students is working to restore the harbor and protect the city from climate change. At the heart of the effort is a tiny creature with an outsized talent for cleanup: the extraordinary oyster.

The surprise return of beavers to the British countryside brings benefits and controversy for humans and wildlife alike. The work of these famously busy rodents increases local biodiversity, reduces storm-induced flooding, and restores wilderness to a highly manicured landscape. It also injects some chaos into the lives of the beavers’ human neighbors. Can the British beavers regain their former glory as powerful ecosystem engineers, or is their new home too domesticated to return to the wild?

One of the most inspiring conservation stories in American history is playing out on, of all places, a live-fire training ground at Ft. Bragg Army base in North Carolina. There, an improbable alliance is giving a special bird—the endangered red-cockaded woodpecker (RCW)—a new lease on life. After a clash between U.S. Fish and Wildlife and the U.S. Army revealed that low grade forest fires sparked by artillery and tracers inadvertently created excellent woodpecker habitat, the two sides joined forces to monitor and protect the birds on the base. Landowners on nearby properties are joining the effort—putting aside mutual suspicions and using fire to save the RCW and ignite a passion for wildlife.

Ecuador is one of the most biodiverse places on the planet, yet its wild spaces are also among the most threatened. In 2008, the country became the first nation in the world to enshrine the “rights of nature” in its constitution—granting wild species their own legal rights to exist. Today, conservationists are putting that powerful tool to the test as they battle to save the country’s biodiversity.

Ten years after the largest dam removal in history—on the Elwha River, in Washington State—scientists are chronicling an inspiring story of ecological rebirth. Recovering salmon populations are transferring critical nutrients from the ocean into the forests along the Elwha’s banks, enriching the entire ecosystem. The Elwha’s revival is encouraging advocates to push for the removal of many larger dams in the region, and in the rest of the world.

Decades of war and unsustainable agriculture have stripped almost half the trees from the rainforest atop Mozambique’s Mount Gorongosa. The devastation threatens the watershed that sustains life in nearby communities and in Gorongosa National Park. Now, park experts and local farmers are uniting to plant a new shade-loving cash crop—coffee—that will help restore the forest and ensure a more prosperous future for humans and wildlife alike.

The axolotl—an amphibian with incredible regenerative abilities—is ubiquitous in pet stores, science labs and pop culture, yet almost extinct in the wild. Now, scientists and farmers in Mexico City are using ancient Aztec farming techniques to secure the creature’s future. Meanwhile, another team is partnering with salamander-breeding, cough syrup-making Dominican nuns to save a closely-related species—the achoque.

Dogs are often thought of as humans’ best friends. But in Australia, they’re also being enlisted to save other species. Canine conservationists—and their sensitive noses—are helping researchers locate dwindling populations of elusive koalas as their habitats get fragmented by urbanization and devastated by wildfires. Dogs are also helping scientists track down—and take out—invasive foxes that have been devastating native sea turtle populations.