New York’s records for the masked shrew run past 1,600, most from GBIF with a smaller iNaturalist share, concentrated in Adirondack Park and across Long Island’s pine barrens and coastal plain. For a mammal this small and this rarely noticed, that’s a substantial record set.
Everywhere there’s damp ground and cover
This is one of the most widely distributed small mammals in North America, and New York’s range of habitat shows why. Moist leaf litter and downed wood in Adirondack conifer-hardwood forest suit it just as well as the damp hollows tucked between dunes and marsh edges on Long Island’s Pine Barrens and Fire Island. What it needs isn’t a particular forest type so much as cover and dampness at ground level, conditions New York offers in both its northern mountains and its coastal lowlands.
A body too small to slow down
A masked shrew weighs about as much as two dimes, and that tiny size comes with a metabolism it can’t afford to rest. It hunts insects, worms, and other invertebrates in short bursts nearly around the clock, staying active through winter under snow and leaf litter rather than sleeping the cold away. Most individuals live less than a year, burning through that short life at a pace few other New York mammals match.
A summer and fall surge
Records climb sharply from June through October, peaking in July. That’s less about the shrew changing behavior and more about young shrews from spring litters dispersing and turning up in surveys, on top of more shrews on the ground after a summer of breeding.
Status in New York
NatureServe ranks the masked shrew S5, secure, and it’s native to New York. It’s one of the most frequently recorded small mammals in the state’s data, at home in habitat as different as Adirondack forest floor and Long Island’s barrier-island scrub.
Full species profile
