A vagrant shrew is about the size of a thumb, with a pointed muzzle and reddish-pigmented teeth, and it needs damp ground: springs, marsh edges, and grassy stream banks that form narrow green ribbons through Idaho’s drier country. All 485 Idaho records come from GBIF rather than iNaturalist, in keeping with a creature that spends its life buried in wet meadow grass rather than out where a camera would find it.
Records climb steadily from spring into a July peak of 84, then taper through fall, with a smaller but real showing even in December. That pattern likely reflects when survey traps are set as much as when shrews are most active, since this species hunts around the clock every day of the year rather than keeping to one season.
NatureServe ranks it S5, Secure, in Idaho, the healthiest rank on the scale. A body this small burns fuel fast, so a vagrant shrew has to keep hunting insects, worms, and spiders nearly nonstop just to survive the night.
Full species profile
