The northern short-tailed shrew turns up often in Massachusetts’s occurrence data, with 1,144 records despite being one of the hardest mammals in the state to actually see. Most of what gets logged comes from trapping surveys and chance finds in leaf litter, not casual sightings.
Statewide, but easiest to find in damp forest soil
Records span the state, led by Worcester and Middlesex counties, from Mount Holyoke Range State Park above the Connecticut River Valley east to Minute Man National Historical Park and out to Cape Cod National Seashore. That spread fits a species that needs loose, moist soil and a thick leaf litter layer to tunnel through rather than any one Massachusetts landscape in particular.
One of the few venomous mammals in North America
This shrew is one of a small handful of mammals anywhere with venomous saliva, delivered through grooved lower teeth and strong enough to subdue prey many times its own size. Hunting insects, worms, and snails nearly around the clock burns through so much energy that it needs to eat close to its own body weight every day just to survive.
A late-summer and fall bump in the records
Reports climb through the summer and peak in September before falling off in winter. That timing lines up with young shrews from spring and summer litters dispersing on their own, turning up more often in gardens, compost piles, and leaf litter than their more secretive parents ever do.
Status in Massachusetts
NatureServe ranks the northern short-tailed shrew S5, secure, and it’s native to the state. It’s rarely seen but consistently found wherever Massachusetts still has enough leaf litter and loose soil left undisturbed, which in practice covers most of the state outside the most heavily paved parts of the Boston Basin.
