Size: Smallest species:  17cm  (32 cm including the tail), Largest species:  40cm (73 cm including the tail)

Dietary Needs: A large part of their diet is spruce nuts, but also includes various other seeds and fruit. It also includes a small amount of invertebrate prey.

Life Cycle: Males and females meet only to mate, otherwise they don't generally see each other. Males seek the scent of females while also trying to bring females closer to him with chirping ultrasonic calls. After mating they go their separate ways and the female raises her pups alone. She starts off with about six pups which learn to move around and climb out of the nest very quickly, within a week. By time they're fully mature in around three months, there is normally between one and three pups left.

Other: They hoard food in the autumn time to see them through the winter, making multiple hidden stockpiles of food. They won't remember where all of these stockpiles are, and other animals will find some of the stockpiles. But the beauty of making many stockpiles is that there is always something left for the spruce leaper. In the spring the forgotten stockpiles of seeds germinate, creating unique densely packed patches of various plants.

Has long, strong hind legs for leaping distances. It's foot is also extended slightly for this purpose. It can leap from branch to branch, and if trees are close enough they can leap from tree to tree. This is mainly to avoid arboreal cats who can be very athletic, so the mice need to be more athletic. It is also to be able to travel without having to veture into the more dangerous ground level area.