So, if you’re curious about what polar bears actually eat, here’s the quick answer: polar bears love high-fat seals, especially ringed and bearded seals, because their blubber gives the bears the calories they need to stay warm and alive. That single food shapes almost everything about a polar bear’s life.
Let’s get into how polar bears hunt on sea ice, why they sometimes eat other animals, and how melting ice changes their meals. There’s a lot more to their diet and hunting than you might expect.
Polar Bear’s Favorite Foods and Main Diet
Polar bears need high-fat marine mammals to fuel their bodies. They hunt seals on Arctic sea ice and pick prey that gives them the most calories for the effort.
Ringed Seals: The Ultimate Favorite
Ringed seals make up most of a polar bear’s meals. You’ll often spot polar bears waiting by breathing holes or sneaking up on lairs where ringed seals come up for air.
Ringed seals are small enough for one bear to handle, but they’re packed with blubber. That means each seal gives a big calorie boost for not a ton of work.
These seals live near fast ice and create breathing holes in the ice. Polar bears sniff out these holes and can sit still for hours, just waiting. That ambush style saves energy and usually pays off.
In spring, ringed seal pups become especially important. They’re easier for bears to catch, and their fat helps mother bears store energy for nursing and fasting.
Bearded Seals and Other Seal Species
Bearded seals are bigger and have even more blubber than ringed seals. Polar bears go after bearded seals on ice floes or shore-fast ice when the seals haul out to rest.
One bearded seal can feed a bear for several days. That’s a lot of meals from a single catch.
Harp and ribbon seals show up in the diet too, especially when they migrate. Harp seals are more common offshore, while ribbon seals become targets when ice conditions bring them closer.
The types of seals polar bears eat mostly depend on where and when they’re hunting. It’s all about what’s available.
Sometimes, polar bears find whale or walrus carcasses to scavenge. These big finds give them a ton of fat and meat without the risk of hunting live prey.
Blubber and the Need for a High-Fat Diet
Blubber is absolutely essential for polar bears. They almost always eat the thick blubber layer first because it’s loaded with energy and helps them stay warm in brutal Arctic weather.
Blubber also matters for reproduction. Female bears need those fat reserves to get through pregnancy and feed their cubs.
Polar bear bodies run on fat. Lean meat alone just doesn’t cut it. When sea ice shrinks and seals get harder to catch, bears sometimes eat land foods, but those don’t even come close to the calories in seal blubber.
If polar bears can’t get enough blubber, it hurts their health, their ability to have cubs, and their chances of surviving long-term.
If you want more details on seal species and how polar bears hunt, there are some great field reports and studies out there.
Hunting Behaviors and Diet Changes
Polar bears depend on fat-rich prey and have surprisingly flexible hunting habits. They catch seals at breathing holes, eat other big marine animals, and face real challenges as sea ice disappears.
Seal Hunting Techniques: Breathing Holes and Aglu
Polar bears hang out by seal breathing holes, ready to grab a seal when it pops up for air. Seals make several holes and use them often, so bears use their noses and a lot of patience to pick the best spot.
Stalking is another move they use. When a ringed seal is lying on the ice, a bear creeps forward, freezes if the seal looks up, and then charges from about six meters away.
The Inuit call a seal’s breathing hole an aglu. Bears learn where aglus cluster and sometimes wait at the best ones for hours—or even days.
This hunting style gives them the most fat for their effort. That blubber is what powers their ability to raise cubs and survive the cold.
Alternative Foods: Walruses, Whales, and Bird Eggs
When seals get scarce, polar bears switch things up. They’ll go for walrus calves or scavenge whale carcasses.
Adult walruses are dangerous, so bears usually only try for the young or sick ones. Scavenging leftovers at walrus haul-outs is safer.
A beached beluga or narwhal carcass can feed several bears for days. Whale carcasses offer lots of fat and protein, but they’re rare and unpredictable.
During summer, when bears end up on land, they might eat bird eggs or whatever carcass scraps they can find. Eggs and small prey help mothers and cubs get by for a while, but honestly, nothing on land matches the energy in seal blubber.
Impact of Sea Ice Retreat and Arctic Ice Melt
When sea ice retreats earlier and reforms later, polar bears have to change how they hunt and feed. The shorter seal-hunting season means adults go hungry for longer, and cubs don’t get enough food to grow properly.
You’ll probably notice more bears swimming for miles or wandering onshore. Sometimes they even show up near people, looking for scraps or scavenging bowhead bone piles along the coast.
If mothers can’t find enough seals, their cubs struggle to survive. After all, moms need those high-fat meals to nurse and teach their young how to hunt.
The changing ice patterns also mess with where aglus form. Old hunting spots just aren’t reliable anymore, so bears end up roaming farther than before.
