Wood rats live across much of North America, from southern Canada through the United States and into Mexico and Central America. There are roughly 20 species in the genus Neotoma, and collectively they occupy an impressive range of habitats, from scorching desert floors to alpine peaks above 14,000 feet. Where you find them depends entirely on which species you’re looking at.
Geographic Range Across North America
Wood rats are found in nearly every U.S. state west of the Mississippi, and several species extend into the eastern half of the country as well. The eastern wood rat lives in the Appalachian Mountains and surrounding areas, while the bushy-tailed wood rat ranges from the Yukon and British Columbia down through the western United States. Desert wood rats and white-throated wood rats dominate the arid Southwest, spanning Arizona, New Mexico, Nevada, Utah, and into northern Mexico. The Mexican wood rat and several lesser-known species push the range deep into Mexico and parts of Central America.
The bushy-tailed wood rat holds the title of the most northerly species, reaching into boreal forests of western Canada. At the other extreme, the Key Largo wood rat is confined to a tiny sliver of tropical hardwood hammock in Key Largo, Florida. That subspecies is federally listed as endangered, critically imperiled at both the state and global level, with its entire population limited to a single island.
Habitats by Species
The sheer variety of ecosystems wood rats occupy is one of their most notable traits. A single genus has colonized deserts, mountain forests, prairies, coastal scrublands, and tropical hammocks.
Bushy-tailed wood rats are most closely tied to mountain habitats. They live in ponderosa pine, Douglas fir, spruce, and aspen forests, as well as pinyon-juniper woodlands and sagebrush flats. In northern Utah, they turn up in high-elevation meadows and aspen stands within the spruce-fir zone. In the Sierra Nevada, they often move into areas of Jeffrey pine and lodgepole pine that have recently burned. Their full ecosystem list reads like a catalog of western landscapes: redwood forest, chaparral, alpine tundra, mountain grasslands, larch stands, hemlock groves, and desert shrub.
Desert wood rats (sometimes called pack rats) thrive in the arid Southwest, building their dens among cactus, particularly prickly pear and cholla, which offer both food and protection from predators. White-throated wood rats favor rocky desert slopes and canyon walls in similar regions. The dusky-footed wood rat is a lowland and foothill species common in California’s oak woodlands and chaparral. Eastern wood rats prefer rocky outcrops, cliff faces, and cave entrances in deciduous forests.
Elevation Range
Wood rats as a group span from sea level to over 14,000 feet (4,300 meters). The bushy-tailed wood rat accounts for much of that upper range, living in alpine and subalpine zones across the Rockies, Cascades, and Sierra Nevada. Most species, though, stay below about 8,000 feet. Desert-dwelling species typically occupy low basins and mesas between 1,000 and 5,000 feet, while the eastern wood rat rarely climbs above 3,000 feet in the Appalachians.
Where They Build Their Nests
Wood rats are famous for their nests, often called middens or “stick houses.” These structures can be enormous, sometimes several feet across, and a single midden may be used and added to by generations of wood rats over thousands of years. Scientists have collected middens from rock crevices and shelters in the Uinta Mountains of northeastern Utah that contain plant material dating back 40,000 years, making them invaluable records of past vegetation and climate.
The specific nest site depends on what’s available. Rocky species wedge their middens into crevices, cliff overhangs, cave mouths, and talus slopes. Forest-dwelling species build at the base of large trees, inside hollow logs, or in dense brush piles. Desert species often construct their nests at the base of cactus clumps or thorny shrubs, weaving in spiny plant material that deters coyotes, foxes, and owls. Bushy-tailed wood rats are the most arboreal of the group and sometimes build nests well off the ground in tree cavities or on large branches.
In areas near people, wood rats readily move into attics, sheds, cabins, and abandoned vehicles. Their habit of collecting shiny or unusual objects and leaving something else behind is what earned them the nickname “trade rats” or “pack rats.”
What Makes a Good Wood Rat Habitat
Across all species, wood rats need three things from their environment: shelter with structural complexity (rocks, dense vegetation, or debris), a food source within a short distance of the nest, and protection from weather extremes. They don’t dig burrows the way many rodents do. Instead, they depend on existing structures like rock piles, root tangles, or thick brush to anchor their nests. This is why you almost never find wood rats in open, flat terrain with no cover.
Food requirements vary by species but generally include seeds, nuts, berries, green vegetation, cactus pads, bark, and fungi. They cache food in and around their middens, which is part of why the nests grow so large over time. Water needs are modest. Desert species can survive entirely on moisture from the plants they eat, which is one reason they thrive in places that would challenge most rodents their size.
Threatened and Restricted Populations
Most wood rat species have healthy populations and broad ranges. The Key Largo wood rat is the major exception. Found only in the tropical hardwood hammocks of Key Largo, Florida, this subspecies faces threats from habitat fragmentation, hurricanes, and wildfire. Its extremely limited range means a single catastrophic event could devastate the entire population. It is protected under the Federal Endangered Species Act.
The Allegheny wood rat, a population of the eastern wood rat found in the northeastern United States, has also declined significantly. It has disappeared from much of its former range in New York, Connecticut, and parts of Pennsylvania, likely due to a combination of habitat loss, a fatal parasite carried by raccoons, and forest fragmentation. Several states list it as endangered or threatened at the state level.