When temperatures drop in Montana, wild bison migrate to lower elevations outside the boundaries of Yellowstone National Park. But once outside, they run the risk of being killed because some carry a chronic disease called brucellosis that ranchers fear could spread to cattle.

A short documentary about the life of wildlife photographer Alex Prieditis and his love of shorebirds.

Deep in Mexico’s mushroom-rich forests, two women from indigenous communities have become mycologists. This immersive sci-fi documentary follows their unusual, fungi-driven paths as they seek to reconcile the past and present while reimagining the future for themselves and the changing world they inhabit.

A race is on to save Gabon’s Moukalaba-Doudou National Park and the silverback gorillas that call it home. Once, this area was protected by a thriving oil industry, but now, big companies are moving out and the logging industry is poised to move in. Ecotourism could be the only way to prevent the trees of this rainforest from coming down, but a team of conservationists needs to make the gorillas of Gabon tolerant of humans first. Follow them as they get up-close with the gorillas, study their moves, and journey to war-torn Central African Republic to learn the secrets of successful gorilla habituation.

In this retrospective tribute, acclaimed filmmaker Jean Walkinshaw hails the 100th anniversary of Mount Rainier National Park in Washington by talking to those who know it best: the scientists, naturalists, mountain climbers and artists whose lives have been touched by the peak's far-reaching shadow. The result is a harmonious blend of archival material and high-definition footage celebrating an icon of the Pacific Northwest.

Over a 10-year period, more than 300 people disappeared from the area surrounding Tanzania's Lake Tanganyika. At first, the disappearances were attributed to a serial killer or tribal warfare, but scientists eventually discovered that the culprit was a huge, man-eating crocodile dubbed "Gustave." This fascinating PBS documentary chronicles scientists' efforts to trap Gustave and move him to a nature preserve before he strikes again.

A documentary about wild dogs. Features the Arctic fox, the desert jackal, the raccoon dog and the red fox. Produced, directed, and edited by Phil Coles.

Animals and plants play an important role in the Christian festival. This documentary answers questions about the natural history of Christmas: How are the descendants of the biblical donkey doing? How do Santa's reindeer survive the winter? And what does the robin have to do with all this? Adventurous stories set in dreamlike landscapes around the world.