Okay, here’s where it gets really wild. A bear’s weight is not a fixed number. It’s a seasonal rollercoaster. In the fall, bears go into a frenzy called “hyperphagia,” which is a fancy scientist word for “eating everything in sight.” A grizzly can gain 3 to 4 pounds per day during this period.
That’s like you eating an entire pizza, a tub of ice cream, and a bag of donuts every single day for three months. And you’d still probably only gain 30 pounds. Bears put us all to shame. By the time they crawl into their den for winter, they are essentially walking butterballs. A male grizzly can be 30% body fat by winter, and that’s considered healthy.
Then they sleep for months. They don’t eat, they don’t drink, they don’t pee. And when they wake up in spring, they’ve lost hundreds of pounds. Imagine going on a diet where you just sleep for five months. Sounds like a dream, right? Except when you wake up, you’re so hungry you’ll eat a moose.
