The northeastern marsh rice rat has a thin but real presence in Virginia’s records, 39 in total, concentrated in the tidal wetlands where this swimming rodent actually lives.
A swimmer confined to Coastal Plain marsh
Marsh rice rats swim through flooded grass to reach food and cover, a habit that ties them tightly to Virginia’s tidal and freshwater marshes rather than upland forest or field. Records come from Mason Neck National Wildlife Refuge, where tidal freshwater marsh lines the Potomac at the species’ northern range edge, and from the more classic brackish wetlands of Great Dismal Swamp and the Chesapeake Bay shoreline farther south and east.
One sharp spike, not a seasonal signal
September accounts for well over half of Virginia’s total records, a spike far too abrupt to reflect any real change in the rat’s activity. It more likely traces to one concentrated survey effort that happened to run that month rather than a genuine seasonal surge, a reminder that occurrence counts track observer effort as much as animal behavior.
Status in Virginia
NatureServe ranks the northeastern marsh rice rat S5, secure, and it’s native to Virginia. Its scattered records simply track how hard tidal marsh is to survey, not any concern about its numbers here.
