Great Basin pocket mice carry fur-lined external cheek pouches, the “pockets” in their name, which let them haul seeds back to underground caches without using their mouth. Records concentrate in the dry bunchgrass and sagebrush country of the Blue and Wallowa mountains, exactly the open, sandy ground this species needs for digging burrows.
Oregon’s 461 records lean almost entirely on GBIF specimen data, with just 11 iNaturalist photographs, a fair reflection of a small nocturnal rodent that spends the day sealed underground. Records climb through spring to a September peak, likely tracking when trapping surveys run most rather than a true late-summer surge, since this species enters torpor and stays largely inactive through Oregon’s colder months.
Full species profile
