A wolverine is only about the size of a medium dog - around a metre long, weighing 10 to 25 kilograms. But pound for pound, it is one of the strongest mammals in the world. Its jaws are powerful enough to crunch through frozen meat and bone. Its short, thick legs can carry it across snow that would slow down much bigger animals.
Wolverines wander huge distances. A single wolverine might cover an area the size of a city in just a few days, looking for food. They will eat almost anything - small animals, berries, eggs, leftovers from a wolf hunt. In winter, when food is scarce, they bury extra food in the snow like a freezer for later.
Their fur is amazing. It is thick, brown-black, with a creamy stripe down each side, and it doesn't freeze when ice or snow gets stuck in it. People in the far north used to use wolverine fur to line the hoods of their winter coats, because frost just falls off it instead of sticking.
Wolverines are very shy. Most Finns who spend their whole lives in the forest never see one. They prefer to be alone, prefer to move at night, and slip away the moment they hear humans coming. There are hidden cameras in the forest that occasionally catch a glimpse - those are the photos you sometimes see.