The lemming is a little arctic rodent, living mainly in tundra where it can build tunnels everywhere. The lemming is known to be quite prolific, and actually, lemmings have high reproductive rate. In case of overpopulation, lemmings tend to leave in every direction looking for food and shelter. That’s why lemming is considered as a suicidal animal. The truth about that strange behaviour is because lemmings have notoriously poor eyesight and cannot distinguish a small river, which they can easily cross, from a fjord, in which they will almost surely drown. Legends slightly exaggerate this behaviour characterize just a few animals and are strictly accidental. There are no mass suicidal tendencies in these cute lil’ rodents.

Big american rodent. It's a very social animal with a complex language, they live in groups like families. The babies born need lots of care because when born, they are blind and don't have fur. It's a key animal af plains ecosystem. The are the prey of predator such as ferrets, foxes, eagles or badgers. They are currently exterminated by north american farmers. Today some species are threatened with extinction.