Siberia is a massive, sparsely populated region in Northern Asia that makes up about 77% of Russia's total territory.
In some circles Winter Whites are actually referred to as the Siberian hamster!
Where would they live in Siberia?
They would avoid thick forests or overly wet regions and instead would prefer a more open, dry, and cold environments where they can burrow. They would dig deep burrows to escape the cold and predators, often with multiple chambers and entrances.
So, picture frozen steppe landscapes- which just means, a wide, flat, and treeless plains with dry grasses and plants- that's the kind of place a wild Winter White would call home in Siberia.