Overview
The cotton mouse (Peromyscus gossypinus) is a small rodent in the family Cricetidae. It belongs to the genus Peromyscus, a diverse group of North American mice. The species is native to the southeastern United States and plays a common role in woodland and edge ecosystems. For general species information see the cotton mouse page and distribution notes for the United States.
Characteristics
Cotton mice are medium-sized Peromyscus with soft fur usually ranging from grayish-brown to reddish on the back and a paler or white belly. They have relatively large eyes and ears, a long tail often scaly or sparsely furred, and sharp incisors. External features overlap with other Peromyscus species, so scientific identification sometimes relies on skull measurements or genetic markers.
Habitat and distribution
Found primarily across the southeastern coastal plain, cotton mice occupy diverse habitats such as hardwood forests, cypress swamps, pine woods, and brushy fields. They are adaptable, nesting in cavities, logs, dense vegetation or occasionally in buildings near wooded areas. Local distribution can be patchy where suitable cover or food is limiting.
Behavior and diet
These mice are largely nocturnal and omnivorous. Their diet includes seeds, nuts, fruits, insects and sometimes fungi. As seed predators and dispersers they influence plant regeneration, and as prey they support owls, snakes, foxes and other predators. Typical behaviors include solitary or small-group nesting and active foraging at night.
Reproduction and life history
Cotton mice breed several times per year in favorable conditions. Females produce multiple litters and invest in nest building and care until young are independent. Lifespan in the wild is short compared with larger mammals; survival depends on food, cover and predation pressure.
Conservation and notable facts
The species as a whole is not considered globally extinct, but some isolated or island populations have declined and certain subspecies are legally protected where habitat loss or development has fragmented their range. Conservation efforts focus on habitat preservation, controlling invasive predators and monitoring vulnerable local populations. The cotton mouse is also of interest in ecological studies of small mammals and forest dynamics.