Access to this video is a benefit for members through PBS Passport.
Up Next
Back to Show
Watch Preview
Nature
Fortress of the Bears
Season 30
Episode 6
Alaska's Admiralty Island is home to an estimated 1800 brown bears, the largest concentration of bears in the world. Enter a world shaped by bears, trees, and salmon, and the delicate balance of their interconnected lives.
Support Provided By
Unlock with PBS Passport
53:18
Get an intimate look at a silverback family in Gabon’s Loango National Park.
Unlock with PBS Passport
53:18
A Madagascan chameleon and a Scottish water vole travel to secure their bloodline.
Unlock with PBS Passport
53:18
A Taiwanese Pangolin and a Brazilian Lion Tamarin family travel to a strange new world.
Unlock with PBS Passport
53:18
A baby turtle in Canada and a young bushbaby in South Africa search for a safe new home.
Unlock with PBS Passport
53:18
A Tasmanian man befriends a platypus while protecting the species from urban development.
Unlock with PBS Passport
53:18
David Attenborough presents seven of the most remarkable animal songs found in nature.
53:18
A Caribbean coral reef discovery marks a new chapter in understanding and saving corals.
Unlock with PBS Passport
53:10
Embark to Niagara Falls and witness its amazing beauty and the wildlife that call it home.
Unlock with PBS Passport
53:13
Discover the powerful effect hummingbirds have over their wild neighbors in Costa Rica.
Unlock with PBS Passport
53:13
Join scientists as they go to extraordinary lengths to understand wild dogs.
Unlock with PBS Passport
53:13
How do wild dogs survive and thrive in the wild?
Unlock with PBS Passport
53:13
Meet the many species of canids, the family of wild dogs.