Wildlife Clinic

Species

Meadow jumping mouse

Zapus hudsonius

A small mouse with a very long tail and long hind feet that leaps through grass and hibernates for half the year.

A close view of a meadow jumping mouse in grass, its large dark eye and yellow-brown fur sharp.

Photo Ryan Hodnett (opens in a new tab) / iNaturalist, CC BY-SA 4.0 (opens in a new tab)

At a glance

Size
Body about 7 to 9 cm; tail about 10 to 15 cm
Weight
About 15 to 25 g
Habitat
Wet meadows, grassy stream banks, marsh edges and damp fields
Diet
Seeds, fruit, fungi and insects
Active
Night
Shelter
Grass nests on the ground in summer; burrows for hibernation
Lifespan
A year or two
Rabies vector
No

Identification

Key marks
Yellow-brown sides, darker back stripe, white belly; very long tail, much longer than the body; long hind feet
Movement
Leaps in bounds when disturbed rather than running
Told apart from
Woodland jumping mouse, which has a white tip to the tail and brighter orange sides
Told apart from
Other mice, whose tails are much shorter and which run rather than leap
Where to look
Wet grassland and stream banks; in Georgia, rare and scattered in the north

Behaviour

Meadow jumping mice move through tall grass in a series of long leaps, using their long hind feet to spring and their long tail for balance. They are active at night and feed on grass seeds, fruit, fungi and insects.

They are deep hibernators. After fattening up in late summer, they spend six months or more asleep in an underground nest, one of the longest hibernation periods of any North American mammal.

Why they matter

Jumping mice are part of the wildlife of wet meadows, a habitat that has been drained and ploughed across much of the East. In Georgia they are rare, and where they occur they are a sign of a healthy wet grassland.

Their long hibernation also makes them an unusual mammal: a mouse that is awake for only about half the year.

Reproduction and lifecycle

Breeding — late spring and summer, one or two litters
Gestation — about 18 days
Litter — usually four to six young
Weaning — at about four weeks old
Hibernation — from autumn to spring, often six months or more
Lifespan — a year or two

Living around people

  • Draining and mowing wet meadows removes their habitat.
  • Leaving uncut grass along streams and ditches helps them.
  • A jumping mouse found in winter is hibernating and should be left undisturbed.

Misconceptions

  • A mouse that leaps like that must be a baby kangaroo rat. It is a native jumping mouse, with no relation to desert kangaroo rats.
  • All mice are active in winter. Jumping mice hibernate for half the year.

Related species

Seasonal activity

When this species is breeding, and when there are nests on the ground. Mowing during the shaded months is how most nests are found.

Breeding and active nests by month for this species
JanFebMarAprMayJunJulAugSepOctNovDec
BreedingJan: noFeb: noMar: noApr: noMay: noJun: noJul: noAug: noSep: noOct: noNov: noDec: no
Active nestsJan: noFeb: noMar: noApr: noMay: noJun: noJul: noAug: noSep: noOct: noNov: noDec: no
NotesHibernatingHibernatingHibernatingEmerging from hibernation, males firstBreeding beginsFirst litters born in grass nestsBreeding continuesFeeding heavily to build fatEntering hibernation beginsHibernatingHibernatingHibernating

Where it lives

Recorded in 47 states and provinces. Each one links to the other animals there, and to the rehabilitators licensed for them.

If you found one

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