Truly enormous Bear 747 may be Fat Bear Week’s fattest bear

Welcome to Fat Bear Week at Mashable! Each fall, Katmai National Park holds a competition as Alaska’s brown bears finish fattening up for their long winter hibernation. This year, Mashable is getting in on the salmon-munching action. Check back with us all week as we follow the fat bear face-offs each day, and remember to get your votes in for each round. Happy fishing!


Over the course of just three hours in late June, ecologist Mike Fitz stood atop a bear viewing platform in Alaska’s Katmai National Park and watched Bear 747, a dominant male, consume 15 whole salmon. 

“That’s about 67,000 calories,” Fitz, a former Katmai ranger, said over email.

Fitz has now endorsed Bear 747 as Fat Bear Week’s fattest bear and believes the titanic animal — whose belly is nearly dragging on the ground — is likely to prove victorious in the Fat Bear Week bracket over such formidable contenders as Bear 480, a three-time champion.

Even nearly a month ago, 747 looked incredibly hefty.

It’s normal for bears to exhibit hyperphagia, or excessive hunger, during the summer months. 

This is almost certainly an advantageous adaption as brown bears must live off their stored body fat during the long winter famine.

But 747 has taken it to the extreme.

According to Fitz, who spent the summer in Katmai documenting bear activity, 747 arrived at the salmon-rich Brooks River on June 25, “and he never left for very long.”

Bear 747

Bear 747

Image: Bob Al-greene/Mashable

Most years, bears leave the Brooks River in August when the salmon run declines. But this year was starkly different. Many bears stayed to capitalize upon a consistently rich run of salmon — 747 included.

“Bear 747 is an adult male in the prime of his life,” noted Fitz on his blog. “First identified as a subadult bear in 2004, he’s matured into the largest bear I’ve ever seen.”

Katmai National Park did not immediately respond to inquiries about 747, and his reportedly exceptional girth. 

These fat bears, while an entertaining natural phenomenon, are illustrating their impressive survivalist abilities. And, it should be noted, they’re able to accomplish this in a protected wild land — a national park nearly untrammeled by development. 

The 2018 Fat Bear bracket.

The 2018 Fat Bear bracket.

Image: bob al-Greene/mashable

The forthcoming Fat Bear Week champion, however, is still far from decided. Watch for Mashable’s daily face-off announcements and results as the contest unfolds. 

Details about voting, which begins Wednesday, Oct. 3 on Katmai’s Facebook page, can be found here

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