“Why are the bears in Finland so much smaller than the bears in Alaska?” It’s one of the questions we hear more than almost any other.
At first glance, it’s a reasonable assumption to think they must be different species. After all, an enormous Alaskan brown bear can weigh more than twice as much as the bears photographed in Finland.
Yet here’s the fascinating part. They are both brown bears (Ursus arctos). In fact, despite living over 6,000 kilometres apart, they’re members of the very same species.
So why does one population produce bears approaching 700 kg (1,500 lb), while many adult male Finnish bears weigh closer to 180–300 kg (400–660 lb)? The answer lies in four key factors: diet, habitat, genetics and competition. Together, these have shaped two very different populations of one remarkable animal.
Brown bears are one of the most widespread large mammals on Earth. They occupy habitats stretching from Spain to Japan, Scandinavia to Alaska. But while they’re genetically the same species, brown bears have evolved to take advantage of whatever food is available within their local environment.
That’s why a bear living beside the salmon rivers of coastal Alaska looks completely different from one roaming the pine forests of eastern Finland. Nature builds animals to suit the landscape they live in.
If there’s one factor that explains the dramatic size difference better than anything else, it’s food. Quite simply, Alaskan bears eat far more calories — and not just more calories, much richer calories.
Each summer, millions of Pacific salmon return to Alaska’s rivers to spawn. For brown bears, it’s like an enormous all-you-can-eat buffet arriving on their doorstep. Salmon are packed with fat, protein, omega-3 oils and energy.
A single large salmon contains thousands of calories. An adult coastal brown bear may catch dozens every day during the peak of the run. Some bears consume well over 20,000 calories daily. That incredible energy intake allows them to build enormous fat reserves before winter. The result? Some of the largest bears on Earth.
Finnish bears have a very different lifestyle. There are no giant salmon runs. Instead, they depend largely upon what the Boreal Forest provides. Their menu includes:
These foods are nutritious, but they’re nowhere near as energy-rich as salmon. A Finnish brown bear has to spend much more time foraging to obtain enough calories. Instead of rapidly building huge muscle and fat reserves, they remain leaner, lighter and more agile.
The environment itself also influences body size. Alaska contains enormous open landscapes — wide river systems, expansive tidal flats, coastal estuaries, large meadows. These open habitats allow bears to grow exceptionally large without sacrificing mobility.
Finland is almost the opposite. Most bears spend their lives within dense Boreal Forest. Moving through thick woodland rewards agility rather than sheer bulk. Large bears certainly exist in Finland, but carrying an extra 300 kilograms through dense pine forests offers far fewer advantages than it does along an Alaskan salmon river. In many ways, Finland’s forests favour athleticism over size.
Over thousands of years, different brown bear populations have gradually adapted to local conditions. Although Finnish and Alaskan bears belong to the same species, subtle genetic differences have developed between regional populations. Natural selection has favoured traits best suited to each environment.
In Alaska, individuals capable of making the most of abundant salmon had a survival advantage. In Finland, bears adapted to surviving on seasonal berries, insects and forest resources. Generation after generation, these small differences accumulated. Today, the result is two populations that look surprisingly different despite sharing the same scientific name.
Competition is another important piece of the puzzle. Alaska’s coastal salmon rivers provide such an extraordinary abundance of food that many bears can feed successfully within relatively small areas.
In Finland, food resources are much more widely dispersed. Berries ripen across enormous forests. Insects are scattered. Carrion is unpredictable. Rather than gathering in huge numbers around one food source, Finnish bears often roam extensive home ranges searching for seasonal resources. Living this way simply doesn’t support the same gigantic body sizes seen along Alaska’s coastline.
Both Finnish and Alaskan bears hibernate, but they prepare for winter in different ways. Alaskan coastal bears often enter hibernation carrying astonishing quantities of fat thanks to months of feeding on salmon.
Finnish bears also build fat reserves, particularly during the late summer berry season, but they have fewer opportunities to accumulate the extreme energy stores seen in Alaska. This difference becomes obvious by autumn. An Alaskan bear can resemble a living tank. A Finnish bear remains powerfully built but noticeably slimmer.
It’s easy to assume larger bears are somehow stronger or more impressive. In reality, every bear is perfectly adapted to its own environment.
Finnish bears are exceptional forest animals — agile, intelligent, stealthy. Watching one weave silently between towering pines without making a sound is astonishing. Many wildlife photographers actually prefer photographing Finland’s bears because their smaller size allows them to move naturally through woodland, creating wonderfully intimate images that showcase both the animal and its habitat. The forest becomes part of the story.
The dense Boreal Forest creates photographic opportunities that simply don’t exist elsewhere. Rather than standing in open rivers catching salmon, Finnish bears emerge through misty woodland clearings. They walk beneath ancient pine trees. They feed among carpets of bilberries. They rub against centuries-old Scots pines. The result is imagery that feels truly wild.
For us, that’s what makes Finland so special.
Kyle has worked extensively with brown bears across Finland for the past decade and has successfully guided hundreds of nature enthusiasts of all ages and nationalities through the country’s diverse Nordic seasons. His knowledge of the best locations for bear photography throughout Finland is second to none.
Having grown up in Norway, Roger developed a lifelong appreciation for bears. For over 30 years, he has dedicated his career to photographing bears in Finland and is widely recognised for his work with these remarkable animals. His images have appeared in numerous European publications, and he has collaborated with broadcasters including the BBC on the acclaimed series Wild Scandinavia. In 2024, he published two books: The Bear – the Strongest in the Country and The Wolf – the Smartest in the Forest.
At Natures Thrill, we’ve spent years photographing brown bears across Finland’s eastern wilderness. Every tour reminds us that size isn’t what makes these animals extraordinary. It’s their behaviour — watching a dominant male appear silently from the forest, seeing playful cubs chase one another beneath towering pines, photographing bears reflected in mirror-like lakes as the Midnight Sun begins to set. These are experiences that stay with you forever.
Our small-group wildlife photography holidays are designed to showcase not only Finland’s magnificent brown bears but also the remarkable Boreal ecosystem that has shaped them for thousands of years.
Yes. Both are brown bears (Ursus arctos). The size differences are primarily the result of diet, habitat, genetics and local environmental conditions rather than different species.
Adult males typically weigh between 180 and 300 kilograms, although particularly large individuals can exceed this. Females are considerably smaller.
Large coastal males can weigh 450–700 kilograms, with exceptional individuals exceeding these figures before hibernation.
Finland doesn’t have the enormous Pacific salmon runs found in coastal Alaska. Instead, Finnish bears rely mainly on berries, insects, carrion, vegetation and occasional mammals.
That depends on the experience you’re looking for. Alaska offers dramatic encounters with some of the world’s largest bears feeding in open landscapes. Finland provides intimate woodland photography, beautiful forest settings and the opportunity to photograph brown bears alongside wolves, wolverines and other Boreal wildlife.
The next time someone asks why Finnish bears are smaller than their Alaskan relatives, the answer is surprisingly simple: they’ve evolved to master completely different worlds. One population thrives beside some of the richest salmon rivers on Earth. The other has become perfectly adapted to Europe’s ancient Boreal Forest.
Neither is better. They’re simply extraordinary examples of how nature shapes wildlife to suit its surroundings. And for photographers and nature enthusiasts alike, that’s exactly what makes both destinations so unforgettable.
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