The western jumping mouse lives in western North America and hops on large hind feet. Its active season is short, and it hibernates through winter.
Its sides are yellow, with a dark stripe down the back. The underside is pale, its hind feet are large, and its long tail is darker above than below.
It is mainly nocturnal but may forage by day. It stores fat before hibernation and may drum its tail on the ground when alarmed.
An extinction-risk assessment has not been added yet.