These are the most popular choice, and there are 2 species of these: the winter white Russian, and the Campbell's Russian. These are very friendly pets, and are very adorable and cute as well. Ideally, the Russian kinds make better pets. The female hamsters are more aggressive in the case of this species as well. Wired cages are suitable for these hamsters, as they do not have the agility to get out of them as and when they please.