Texas is home to 71 species of rodents, making it the most diverse group of mammals in the state. They range from tiny pocket mice weighing a few grams to beavers topping 50 pounds, and they live in every habitat Texas offers: deserts, prairies, coastal marshes, forests, and suburban backyards. Four of those 71 species are non-native introductions that now occur statewide, while the rest are native animals filling ecological roles that have shaped the Texas landscape for thousands of years.
How Many Species and Where They Live
The 71 rodent species in Texas span several major families, each adapted to different corners of the state. The largest family is Cricetidae, which includes mice, rats, and voles. Thirty species from this family alone live in Texas, occupying every type of terrestrial habitat and reproducing quickly, with short life spans and high birth rates. These are the rodents most Texans encounter without realizing it: cotton rats in tall grass, deer mice in rural sheds, woodrats building stick nests under porches.
The squirrel family (Sciuridae) accounts for 10 species across eight genera. This group covers a surprising range of animals: fox squirrels and eastern gray squirrels in urban parks, rock squirrels in the Hill Country, ground squirrels in open rangeland, flying squirrels gliding between pine trees in East Texas, and prairie dogs on the western plains.
The pocket mouse and kangaroo rat family (Heteromyidae) brings 13 species, most of them beautifully adapted to arid conditions in the Panhandle and Trans-Pecos. Kangaroo rats are strongly bipedal with oversized hind legs built for hopping, and they can survive without drinking water by metabolizing moisture from seeds. All of them are nocturnal, carrying food in fur-lined cheek pouches back to underground caches.
Texas also hosts at least nine species of pocket gophers in the genus Geomys alone, each with a fairly specific range. The Attwater’s pocket gopher lives in south-central East Texas, the plains pocket gopher in the northwest Panhandle, and the Texas pocket gopher along the southern coastal plain. These are strictly burrowing animals that spend almost their entire lives underground, pushing up the distinctive mounds of loose soil that frustrate gardeners and ranchers across the state.
The Four Introduced Species
Four non-native rodents have established populations statewide. The Norway rat and the roof rat (also called the black rat) are the two most familiar urban pests. Norway rats are stocky, brown, and prefer ground-level burrows near foundations, sewers, and garbage. Roof rats are sleeker and darker, favoring attics, trees, and elevated spaces. Both species thrive wherever people store food and generate waste.
The house mouse, originally from Central Asia, is the third introduction. It lives in close association with human structures and rarely survives long in wild Texas habitats where native species outcompete it.
The fourth is the nutria, a large semiaquatic rodent from South America that was originally imported for fur farming. Nutria can weigh over 20 pounds and look like oversized rats with bright orange front teeth. Accidental and intentional releases allowed them to colonize wetlands across at least 15 states, with the highest densities along the Gulf Coast of Louisiana and Texas.
Nutria and Wetland Damage
Nutria are among the most destructive invasive rodents in the southern United States. They eat the roots and base stems of marsh vegetation, stripping wetlands down to bare mud. In Louisiana, where monitoring has been most detailed, nutria destroyed roughly 22,000 acres of marsh outright and negatively impacted over 100,000 acres. Texas Gulf Coast marshes face the same pressures.
Beyond vegetation loss, nutria burrows weaken flood-control levees, roadbeds, stream banks, and dams. In agricultural areas, their tunneling breaks through water-retaining levees used for rice and crawfish production. Louisiana launched the Coastwide Nutria Control Program in 2002, paying trappers $4.00 per nutria tail to encourage removal. By the 2003-2004 season, 346 participants collected nearly 333,000 tails. That effort reduced marsh damage by almost 23% in a single year and cut the conversion of marsh to open water by 98% over two years. Texas has pursued similar trapping and removal efforts in coastal counties, though at a smaller scale.
Prairie Dogs and Their Ecological Role
Black-tailed prairie dogs once covered vast stretches of the Texas Panhandle and western plains. Today, less than one percent of the original prairie dog population and habitat remain. That collapse matters well beyond the prairie dogs themselves. Their burrows provide shelter for burrowing owls, Texas horned lizards, rabbits, and rattlesnakes. Prairie dogs are also a primary food source for predators including hawks, eagles, coyotes, and badgers. The critically endangered black-footed ferret depends almost entirely on prairie dog colonies for both food and shelter.
The relationship between prairie dogs and ranching is more complicated than it first appears. Large concentrations can damage crops and compete with cattle for grass. But some Texas ranchers have observed that removing prairie dogs is linked to the spread of woody brush across rangeland, a problem that ultimately harms the livestock industry more than prairie dogs ever did. The animals’ constant clipping of vegetation and soil disturbance historically maintained the short-grass prairie ecosystem that cattle ranching depends on.
Beavers, Porcupines, and Other Native Species
The North American beaver is the largest rodent on the continent and is found along rivers, streams, and reservoirs across much of Texas. Beavers are easily identified by their flat, paddle-shaped, scaly tails and webbed hind feet. Their dam-building creates ponds that benefit fish, amphibians, and waterfowl, though it sometimes conflicts with landowners when flooding reaches roads, fields, or timber.
Porcupines live in the western half of the state, particularly in the Trans-Pecos and Hill Country. They are heavyset rodents weighing 11 to 24 pounds, covered in sharp quills mixed with coarse hair. They are slow-moving, mostly nocturnal, and feed on bark, twigs, and leaves. Dogs that investigate a porcupine too closely are one of the more common reasons rural Texas veterinarians get late-night calls.
Rodent-Borne Disease in Texas
The most significant rodent-associated disease in Texas is flea-borne typhus, sometimes called murine typhus. Texas reports the highest number of cases of any state in the country, and the numbers have climbed sharply. Between 2008 and 2025, over 8,600 cases were reported statewide. Annual case counts ranged from a low of 135 in 2010 to a high of 1,110 in 2025.
The disease spreads when fleas that feed on infected rats or opossums bite people, or when flea droppings contaminate scratches or mucous membranes. Most cases historically concentrated in South Texas, from Nueces County south to the Rio Grande Valley. Over the past two decades, new hot spots have emerged in the Dallas-Fort Worth metroplex, Greater Houston, San Antonio (Bexar County), and Austin (Travis County). About 72% of reported cases required hospitalization, and 17 deaths were attributed to the disease during that period.
Symptoms typically include high fever, headache, and rash appearing five to 14 days after exposure. The illness responds well to antibiotic treatment when caught early, but it can become severe if diagnosis is delayed. Reducing rodent habitat around homes, controlling fleas on pets, and sealing entry points to attics and crawl spaces are the most practical ways to lower risk.
Identifying Common Rodents Around Your Home
If you are finding signs of rodent activity in or around a Texas home, a few details help narrow down the culprit. Roof rats leave dark, spindle-shaped droppings in attics and along rafters, and you may hear scratching overhead at night. Norway rats leave larger, blunt-ended droppings at ground level near foundations, garages, and trash areas. House mice produce tiny, pointed droppings and can squeeze through gaps as small as a dime.
Pocket gophers announce themselves with fan-shaped mounds of fresh dirt in yards and gardens, often with no visible hole at the surface (they plug their tunnels behind them). Moles, by comparison, push up raised ridges rather than discrete mounds, though true moles are insectivores, not rodents. If you are seeing large, crescent-shaped mounds near water, nutria or beaver may be present. Nutria leave distinctive tracks with webbing visible on the hind feet, and their trails often flatten vegetation in straight paths between water and feeding areas.
Eastern fox squirrels and gray squirrels frequently enter attics through gaps at rooflines, especially in fall. Their activity tends to be loudest in early morning and late afternoon, unlike rats, which are most active after midnight. Flying squirrels, though rarely seen, also den in attics and are strictly nocturnal; homeowners sometimes mistake their soft thumping for a rat problem.