Katmai's Brown Bears Haven't Disappeared from Brooks Falls
Famous Alaska bears return for salmon migration season.
1Seasonal Bear Movements
Every late June, brown bears return to Brooks Falls in Katmai National Park for the salmon migration. By August, as salmon reach their spawning grounds, the bears disperse across a wider area. With fish spread out in the Brooks River, the bears explore other streams in the region and take advantage of alternative food sources like berries.
2Preparations for Fat Bear Week
More bears will return to the lower Brooks River by September and October, just in time for the Fat Bear Week competition from October 2-8. An adult male bear can grow from about 700 pounds at the start of the season to over 1,200 pounds by fall. Viewers can still spot the bears occasionally on explore.org's live cameras, with more frequent sightings expected as September approaches.
3Disturbing Nature Events
This season's livestreams showed nature's unpredictability through tragic events. On July 28, Bear 806 killed and ate a spring cub belonging to Bear 909, who started the season with two cubs but has now lost both. Then on August 2, one of Bear 335's (Jolly) cubs died after following three unrelated cubs up a tree where it was attacked.
4A Rare Cub Sighting
Amid the sad news, cameras captured a distinctive silver-furred cub belonging to Bear 677 (Xena). Little is known about Xena, who was first spotted on livestream in 2024 and officially documented in 2025. The bear mostly keeps to herself and was seen fishing on the far side of the Brooks River in early July.
5Possible Reasons for Cub Deaths
Naturalist Mike Fitz and rangers Christine Loberg and Sarah Bruce hosted a discussion about the cub deaths. While infanticide by female bears is known to occur, this appears to be the first documented case at Brooks River. Experts suspect multiple factors including bear adoption, food scarcity, and dominance struggles may play roles in such behavior.
6Tribute to Bear 909
Explore.org released a memorial video on social media honoring Bear 909's two lost cubs. The organization confirmed Bear 909's first cub disappeared earlier in the season with unknown fate, while the second was killed by Bear 806. These events caused significant distress among the livestream's audience.
7Importance of Livestreams
Katmai's live cameras provide valuable insights into bear behavior and ecosystem dynamics. Scientists can document rare behaviors while educating the public about wildlife. The streams have also become a major ecotourism attraction, drawing global attention to Alaska's unique brown bear population.
8Nature's Delicate Balance
These events demonstrate nature's harsh yet balanced systems. Such natural processes are necessary for maintaining healthy bear populations. The livestreams help people understand this complex balance, fostering support for conservation efforts in Katmai National Park and beyond.
Original article: Popular Science — Katmai'nin Kahverengi Ayıları Brooks Falls'tan Kaybolmadı