Vermont’s occurrence databases hold 241 records for the deer mouse, mostly logged through GBIF with a smaller share from iNaturalist. That count traces documented encounters across a species known for turning up almost anywhere, not a full picture of where every mouse is working.
At home from mountaintop to marsh edge
Few native Vermont mammals move between as many kinds of cover as this one. Records come from deep inside the Green Mountains, where the mouse nests in downed logs and tree cavities in hardwood and spruce-fir forest, and from the marshy edges of Missisquoi National Wildlife Refuge along Lake Champlain, a much more open setting where cover comes from cattails and shrubs instead of a forest canopy. Green Mountain National Forest and the Connecticut River valley’s forested uplands offer a similar range of options in between.
An August surge in the record book
Vermont’s recorded sightings climb sharply in August before easing off, then rise again in November. A summer packed with successive litters puts far more young mice on the ground by late summer, which likely explains why more turn up in traps and surveys right around then, not any change in the habitat itself.
Status in Vermont
NatureServe ranks the deer mouse S5, secure, and it’s native to Vermont. Its habit of settling into almost any patch of cover, forest, field, or wetland edge alike, is a big part of why it shows up in nearly every corner of the state’s occurrence data.
Full species profile
