The diet of the woodland jumping mouse includes a variety of fungi, seeds, caterpillars, beetles, nuts, fruits and other plant material (2) (3) (5) (6) (8). Fungi often make up over a third of the diet (4) (5) (8), with underground species such as those in the genus Endogone being particularly important (2) (5) (8) (9). The association of the woodland jumping mouse with cool, moist habitats may partly relate to the availability of this food source (7).
Although it may use long leaps to escape danger, the woodland jumping mouse more often walks around on all fours when moving slowly, or uses short hops for greater speed (2) (3). When escaping, it usually makes several leaps before stopping and remaining motionless under nearby cover (2) (4). The woodland jumping mouse climbs well in bushes, but does not ascend trees (2) (3).
The woodland jumping mouse is most active at night, although it may also be active at dawn and dusk, especially in cloudy or rainy weather (2) (3) (6). This species has a long hibernation, usually lasting from September or October until April or May. During the autumn, the woodland jumping mouse starts to accumulate extra body fat in preparation for hibernation, and will sometimes increase to one and a half times its spring weight (1) (2) (3) (6). No extra food is eaten over the winter months, so any individuals without sufficient fat reserves do not survive (1). In the spring, male woodland jumping mice emerge a couple of weeks before the females (2) (3) (10).
This small rodent builds a globular nest of dry grass and leaves, usually in an underground burrow, in a hollow log or fallen tree, or in a pile of brush (1) (2) (3) (4) (5). Burrows may be dug by the mouse itself, or taken over from another small animal. The entrance is concealed during the day (2) (3). The breeding season of the woodland jumping mouse runs from May to early September, although births usually peak in June and August (1) (2) (3) (5) (6). The gestation period is about 21 to 29 days (1) (2) (5), and litter size ranges from 2 to 7 (2) (3). Females sometimes have two litters a year, particularly in more southerly populations (1) (2) (3) (5).
The newborn woodland jumping mice are naked and blind and weigh just 0.9 grams. The young are fully furred by 24 days old and open their eyes at 26 days (2) (3). Weaning takes place by about 34 days old (3). Neither the male nor female woodland jumping mouse breed until after their first hibernation (1) (2) (3) (10). This species may live up to three or four years, but most individuals probably do not survive beyond one or two years (3) (4) (5).