House mice aren’t a wild Alaska species in any real sense. Records tied to Arctic National Wildlife Refuge, the North Slope, and Gates of the Arctic National Park and Preserve almost certainly trace to research camps, remote airstrips, and village buildings scattered through those vast areas, not to mice living out on open tundra.
This mouse followed people out of Eurasia and spread worldwide through agriculture and shipping, not through any natural range expansion. In Alaska that means it sticks to wherever people store food or build shelter, gnawing into grain bins, cabin walls, and pantries the same way it does everywhere else it’s turned up.
Records here are sparse, just a few dozen combined, and they show up scattered through most of the year rather than clustering in one season. A mouse that gets indoors can keep breeding right through an Alaska winter that would stop a wild rodent cold.
Full species profile
