Virginia sits at the northern edge of this rat’s range, and its state reports concentrate in the dense coastal grasses of Back Bay National Wildlife Refuge near Virginia Beach and in open fields on Piedmont wildlife management areas farther inland. Both settings offer the thick low grass and marsh-edge cover this species needs; the high country inside the George Washington and Jefferson National Forests offers far less of it, which is likely why records there are sparser.
This is a stocky, bristly-furred rodent, not a slender mouse, and it spends most of its life inside runways it clips through dense grass and weeds rather than out in the open. It eats mostly grasses, sedges, seeds, and fruit, with enough insects mixed in to make it an omnivore, and that plant-heavy diet is what lets it multiply quickly when a wet season produces a flush of green growth.
Records run year-round but peak from April through June and again in August, echoing how fast this species can bounce back once cover and food line up. With Virginia at the edge of the cotton rat’s mapped range, a thin county record here likely reflects how little of the state offers dense enough grass, not a shortage of surveys.
Full species profile
