Maine has only 46 mapped records of the American pygmy shrew, one of the thinnest occurrence counts of any mammal in this atlas. That’s less a sign of scarcity than of how hard this animal is to detect at all. Across its whole range, most confirmed records come from small-mammal trapping surveys, museum specimens, or owl pellets rather than a chance sighting in the field.
Cool, damp ground on Maine’s high peaks
Maine’s records cluster around Baxter State Park and the Western Maine Mountains, both places where forest climbs into cooler, wetter, higher-elevation ground. That fits the pygmy shrew’s needs closely: it hunts through moss, leaf litter, and rotting logs, and it depends on ground that stays damp and shaded even in summer. Maine’s mountain country, especially the higher slopes around Katahdin and the western peaks, holds exactly that kind of cover longer into the season than lower, drier ground would.
A narrow window into an animal that’s almost never seen
Nearly all of Maine’s records land in August and September. That’s likely less about a true rise in shrew activity than about timing: late summer is when small-mammal trapping surveys run in the state’s mountains, and a pygmy shrew caught in a trap line is about the only reliable way anyone documents one. The species doesn’t hibernate and stays active through winter under the snow, but a shrew hunting beneath a foot of insulating snowpack leaves almost no trace anyone above ground would ever record.
Status in Maine
NatureServe ranks the American pygmy shrew S5, secure, and it’s native to Maine. Its thin record count in the state reflects detection difficulty far more than any real scarcity on the ground.
Full species profile
