Idaho’s records for this species total just 50, and that scarcity tracks its lifestyle more than its rarity. Unlike most mice, the northern grasshopper mouse is a hunter. It takes insects, scorpions, and even other mice, and it rears up to give a thin, wolf-like howl to mark territory. That nocturnal, burrowing habit means it rarely crosses paths with people, so records stay thin no matter how many mice are actually out there.
The handful of sightings cluster around the Snake River Plain, Craters of the Moon National Monument, and the Morley Nelson Snake River Birds of Prey National Conservation Area, all classic southern Idaho high desert with the loose soil and open sagebrush this species favors. What few records exist lean toward early summer, with June standing out, but with only 50 total records that’s too small a sample to call a real seasonal pattern.
NatureServe still ranks it S4, Apparently Secure, in Idaho, so the thin record count reflects how hard the species is to observe, not any real concern about its numbers.
Full species profile
