Stunning fat bear wakes up from hibernation and is still huge

A fat bear is a healthy bear.
By Mark Kaufman  on 
a huge Alaska brown bear
Bear 747 during a recent late summer. He's not this big yet, but he's already on his way. Credit: NPS Photo / B. Mosbrook

Alaska's fat bears lose up to a third of their weight during their deep winter slumber.

They often appear in spring or early summer looking relatively gaunt. But the live streaming explore.org wildlife cameras in Katmai National Park and Preserve recently spotted the aptly-numbered bear 747 (a number randomly assigned by park biologists) returning to the river in hulky form.

"Did 747 'BEARFORCE ONE' even hibernate?" explore.org tweeted.

As the clips below show, bear 747 — a large dominant male bear — doesn't look like he's been deprived of 4,500-calorie salmon since last year. Though he does have some fresh-looking wounds, telltale signs of a skirmish with another bear.

Mashable Light Speed
Want more space and science stories in your inbox?
Sign up for Mashable's weekly Light Speed newsletter.
By signing up you agree to our Terms of Use and Privacy Policy.
Thanks for signing up!

Bear 747's robust appearance is a testament to his success in the harsh, wild bear world. He's always one of the fattest, if not largest, bears on the Katmai cams, and was a recent winner of the park's annual Fat Bear Week contest — which is a fall celebration of these thriving Alaskan animals.

A fat bear is a healthy bear. Ample fat stories give these bears better odds of surviving their winter hibernation (or "semi-hibernation") and waking from hibernation in healthier shape, with energy to sleuth out food. Bear 747, however, shows profoundly successful survival skills. He exploits his size to control the best fishing spots, affording him bounties of fatty salmon throughout the summer. He enters the long winter famine at well over 1,000 pounds.

"He's the fattest and largest bear I've ever seen."

"He's the fattest and largest bear I've ever seen," Mike Fitz, a former Katmai park ranger and currently a resident naturalist for explore.org, told Mashable in 2020. "I feel a special bit of privilege to witness a bear as big as he."

Last year, bear 747 used his size and skill to displace the once indomitable bear 856 from the top fishing spots, and the top of the bear cam hierarchy.

Topics Animals

Mashable Image
Mark Kaufman

Mark is an award-winning journalist and the science editor at Mashable. After communicating science as a ranger with the National Park Service, he began a reporting career after seeing the extraordinary value in educating the public about the happenings in earth sciences, space, biodiversity, health, and beyond. 

You can reach Mark at [email protected].


Recommended For You

More in Science

TikTok for Business: Everything you need to know
TikTok for Business


Get up to 25% off sitewide at Solawave
Woman using Solawave


Trending on Mashable
NYT Connections today: See hints and answers for April 23
A phone displaying the New York Times game 'Connections.'

Wordle today: Here's the answer and hints for April 23
a phone displaying Wordle

NYT's The Mini crossword answers for April 23
Closeup view of crossword puzzle clues

The Cybertruck's failure is now complete
Elon Musk standing in front of a Cybertruck with two bullet marks in its windows.

Who's Bluey's baby daddy? Season 3 finale episode 'Surprise' ends on a major mystery
Bandit plays with Bingo and Bluey in "Surprise!"
The biggest stories of the day delivered to your inbox.
This newsletter may contain advertising, deals, or affiliate links. Subscribing to a newsletter indicates your consent to our Terms of Use and Privacy Policy. You may unsubscribe from the newsletters at any time.
Thanks for signing up. See you at your inbox!