Skip to main content
Donate
Fortress of the Bears

Up Next

Siberian Tiger Quest

Siberian Tiger Quest

Season 31 Episode 1
53:10
Animal Odd Couples

Animal Odd Couples

Season 31 Episode 3
53:20
An Original DUCKumentary

An Original DUCKumentary

Season 31 Episode 4
1:00:42
The Mystery of Eels

The Mystery of Eels

Season 31 Episode 10
52:59
Great Zebra Exodus

Great Zebra Exodus

Season 31 Episode 13
52:58
Parrot Confidential

Parrot Confidential

Season 32 Episode 9
53:10
My Bionic Pet

My Bionic Pet

Season 32 Episode 14
52:58
Touching the Wild

Touching the Wild

Season 32 Episode 15
52:58
The Last Orangutan Eden

The Last Orangutan Eden

Season 33 Episode 10
53:10
Animal Homes: The Nest

Animal Homes: The Nest

Season 33 Episode 11
52:55
Animal Homes: Location, Location, Location

Animal Homes: Location, Location, Location

Season 33 Episode 12
52:55
Classic Nature Episodes

Animal Homes: Cities

Season 33 Episode 13
52:55
Back to Show
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.

 Watch Preview
Stream on your TV
Support Provided By
Parenthood
54:33
Season 44 Episode 10
The Greatest Adventure | Parenthood
Parenthood is the ultimate journey, full of danger.
Jungles | Parenthood
Unlock with PBS Passport
52:22
Season 44 Episode 9
Jungles | Parenthood
See how jungle animal parents raise children by mastering their environment.
Oceans | Parenthood
Unlock with PBS Passport
51:50
Season 44 Episode 8
Oceans | Parenthood
Ocean parents must master dedication and intelligence to raise their young.
Freshwater | Parenthood
Unlock with PBS Passport
52:14
Season 44 Episode 7
Freshwater | Parenthood
Animal parents must overcome freshwater’s constant changes.
Grasslands | Parenthood
Unlock with PBS Passport
51:54
Season 44 Episode 6
Grasslands | Parenthood
Animal parents must balance risk and reward to raise their young in grasslands.
What's Streaming on NATURE?
Unlock with PBS Passport
53:24
Season 44 Episode 5
Tusker: Brotherhood of Elephants
Follow the complex lives of giant elephant bulls in Amboseli and Mount Kilimanjaro.
What's Streaming on NATURE?
53:38
Season 44 Episode 4
Jaguar Beach
On Costa Rica’s Pacific coast, turtles and jaguars collide in unexpected ways.
What's Streaming on NATURE?
Unlock with PBS Passport
53:33
Season 44 Episode 3
The Pigeon Hustle
Uncover the secret world of New York and London’s resilient pigeon flocks.
WILLOW: Diary of a Mountain Lion
Unlock with PBS Passport
53:38
Season 44 Episode 2
WILLOW: Diary of a Mountain Lion
Follow a female mountain lion in the Montana mountains over the course of a decade.
Walrus: Life on Thin Ice
Unlock with PBS Passport
53:41
Season 44 Episode 1
Walrus: Life on Thin Ice
See how the Arctic’s most enigmatic animals are coping as the sea ice melts.
Hummingbirds of Hollywood
53:48
Season 43 Episode 13
Hummingbirds of Hollywood
Follow a woman’s transformative journey as she nurtures wounded hummingbirds.
What's Streaming on NATURE?
Unlock with PBS Passport
54:02
Season 43 Episode 12
Salvation | Katavi: Africa's Fallen Paradise
After drought, the rains finally come. But can Katavi survive the flooding?
Show more
Active loading indicator