Little Pocket Mouse (Perognathus longimembris) lives in desert scrub across Southwest North America. It feeds on seeds and insects. Its conservation status is Least Concern.
Fascinating facts about the Little Pocket Mouse
- Five little pocket mice were carried aboard the Apollo 17 command module in December 1972 as part of a scientific experiment, circling the Moon a total of 75 times. The mission lasted several days, and four of the mice survived the entire flight, providing valuable data on mammalian physiology in space. Their successful return demonstrated that small rodents could endure prolonged exposure to micro-gravity and radiation, informing later biological studies.
- In July 1973 six little pocket mice were launched into orbit aboard Skylab 3, extending the species' record of space travel. The mission was cut short when a power failure occurred, and all six animals died after only 30 hours in orbit. This brief exposure highlighted the vulnerability of small mammals to spacecraft system failures and underscored the need for reliable life-support backups in future experiments.
- The little pocket mouse inhabits a wide range across North America, occurring in Baja California and Sonora in Mexico and extending into the United States in Arizona, California, Idaho, Nevada, Oregon and Utah. Within this distribution it prefers subtropical or tropical dry lowland grassland, where it can find the grasses and sagebrush that dominate its arid and semiarid habitats.
- The little pocket mouse begins its nightly routine just after sunset, when it emerges from its burrow. For the first two hours it is highly active, scurrying across the dry grassland to collect seeds and tiny invertebrates. After this burst its movements become irregular, with only occasional foraging trips throughout the rest of the night. Its cheek pouches allow it to transport food back to the safety of its burrow.
- During the cold months the species enters a state of dormancy, remaining hidden in its burrow until spring. From April through November it resumes activity, and the population expands quickly as newborns appear. Numbers reach their highest levels in June and July, coinciding with the peak availability of seeds in the arid grass and sagebrush habitat it occupies.
Sources
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At a glance
RangeSouthwest North America
HabitatDesert scrub
DietSeeds and insects
About the Little Pocket Mouse
In the arid expanse of the desert, a tiny, unassuming hero emerges, the Little Pocket Mouse, its diminutive form belied by a fierce determination to survive in one of the harshest environments on Earth. With a twitch of its whiskers and a flick of its tail, it darts across the sand, its paws barely making a whisper as it navigates a labyrinth of creosote and rock, ever vigilant for the predators that lurk in the shadows. As the sun dips below the horizon, the Little Pocket Mouse retreats to the safety of its underground burrow, its remarkable ability to survive on limited water and food a testament to its enduring spirit.
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