Picture the Arctic: polar bears out on the ice, always on the hunt, living off just a handful of powerful foods. Here’s a quick look at the five main things they eat—and why those foods matter so much when you’re trying to survive in the coldest corners of the world.
Polar bears mostly eat seals, whale carcasses, walrus or young walrus, fish, and birds or eggs. These foods pack in the fat and calories they need, and polar bears have figured out how to find them across the frozen sea.
Let’s break down how each of these foods fits into the polar bear’s hunting style and survival toolkit.
The Five Main Foods Polar Bears Eat
Polar bears really depend on high-fat marine mammals. Sometimes, though, they’ll grab other animals or even plants if they have to. Some prey gives them more calories than others, and bears have their own ways of finding each type.
Ringed Seals: The Primary Prey
Ringed seals are the top prize for polar bears. These seals have thick blubber, and that’s what keeps a polar bear warm and energized.
You might spot a bear waiting for ages by a seal’s breathing hole or sneaking up on one that’s hauled out on the ice. Cubs and mothers with pups are especially valuable targets—more fat, more payoff.
Hunting ringed seals takes a lot of patience. Polar bears rely on their sharp noses to sniff out seals under snow and ice.
One good seal catch can feed a bear for days, so they focus hard on these seals while the sea ice holds.
Bearded Seals and Other Seal Species
Bearded seals—and bigger ones like harp, hooded, and ribbon seals—are on the menu too. Bearded seals are huge and loaded with blubber, so adult bears go after them when they can.
Harp and hooded seals show up in certain seasons during migrations. Ribbon and harbor seals get hunted where their paths cross with bears.
Bigger seals are tricky to catch. Bears often wait at the edge of the ice or set up ambushes for resting seals.
When the ice breaks up, seals get harder to reach. At that point, bears might start scavenging or turn to whatever they can find on land.
Walruses and Whale Carcasses
Walrus calves and whale carcasses can keep a bear fed for days. You’ll sometimes see a bear snatch a young walrus when the mother isn’t around—adult walruses are just too dangerous.
Beluga and bowhead whale carcasses, when they wash up, offer a huge feast of blubber and meat.
Bears sniff out carcasses from miles away, which is kind of amazing. When they find one, lots of bears might show up and eat together, building up fat before the lean times hit.
This kind of food is a lifesaver when sea ice is thin and seal hunting just isn’t working out.
Birds, Eggs, and Fish
When seals are tough to find, polar bears switch it up and go after seabirds, waterfowl, eggs, and fish.
They raid nesting colonies for eggs and sometimes catch ducks or murres by the shore. Fish like Arctic char and salmon get snapped up in shallow rivers or along the coast.
These foods give some protein and hydration, but not much fat compared to seals. Young bears and those stuck on land eat these more often.
You’ll notice these meals go fast—eggs and birds are quick snacks, not long-lasting feasts.
Vegetation, Berries, and Unusual Foods
On land, polar bears munch on kelp, berries (like blueberries and crowberries), and other plants when they can’t find animals.
Sometimes, they’ll even scavenge human garbage or eat crustaceans, mussels, and small mammals like lemmings or foxes.
These foods don’t keep a bear going for long, but they help out during summer when the ice melts. Eating plants and odd things shows how flexible bears can be, but honestly, nothing beats blubber for surviving the Arctic winter.
If you’re curious, check out this detailed guide on what polar bears eat (https://a-z-animals.com/animals/polar-bear/what-do-polar-bears-eat/).
Polar Bear Feeding Behavior and Adaptation
Polar bears depend on sea ice, strong fat reserves, and smart hunting to get most of their calories. Here’s a look at how they hunt seals, what they eat first, and how their diet shifts with the seasons and ice conditions.
How Polar Bears Hunt and Consume Prey
Polar bears use sit-and-wait tactics and slow stalking to nab seals at breathing holes or birth lairs. Sometimes a bear will just stand still for hours, nose in the wind, then suddenly lunge when a seal pops up.
They bite seals behind the head and neck to take them down, haul the prey onto the ice, and always eat the blubber and skin first—those parts pack the most energy.
Bears can down massive meals—sometimes up to 70 kg in one go—and they eat to build up fat. Mothers show cubs how to hunt and teach them to go for the fattiest parts first, so the little ones stay warm and grow strong.
When seals run low, bears scavenge marine mammal carcasses, raid garbage, or go after birds and eggs. It’s not ideal, but sometimes you just have to make do.
Seasonal Diet Changes and Survival Strategies
In spring and early summer, you’ll spot polar bears feeding heavily on ringed and bearded seals. They really try to pack on fat during this time.
That seasonal fat gain gives them most of their energy for those long ice-free stretches. When the ice melts, polar bears tend to fast more and just rely on their stored fat.
Pregnant females head into their dens and use those reserves to nurse their cubs. It’s a tough strategy, but it works for them—at least for now.
As the ice retreats even further, you might catch bears shifting what they eat. Sometimes they scavenge whale bones or chase reindeer along the coast.
They’ll even catch fish, nibble on plants, or go after small rodents and bird eggs if they get the chance. Food stress can push them into risky behavior, like wandering into human settlements or, though it’s rare, cannibalism.
Climate change keeps shrinking the sea ice and stretching out those fasting periods. Because of that, you’re likely to see polar bears trying out new foraging tactics more often these days.
