| Desert woodrat | |
|---|---|
 | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | Rodentia |
| Family: | Cricetidae |
| Subfamily: | Neotominae |
| Genus: | Neotoma |
| Species: | N. lepida |
| Binomial name | |
| Neotoma lepida Thomas, 1893 | |
The desert woodrat (Neotoma lepida) is a species of pack rat native to desert regions of western North America.
Desert woodrats are relatively small for pack rats, measuring 28 to 39 cm (11 to 15 in) in length, including a 12 to 20 cm (4.7 to 7.9 in) tail. They weigh from 122 to 350 g (4.3 to 12.3 oz), with males being larger than females. Their coloring varies between individuals, and can be anything from pale gray to cinnamon to near-black. Regardless of the color on the rest of the body, however, the animal's underparts and feet are always white, while the otherwise pale fur on the throat region is gray at its base. The tail is distinctly bicolored, and has more hair, and fewer visible scales, than the tails of brown rats. Desert woodrats have a narrow snout, long whiskers, and relatively long ears that are almost the length of the hind feet. [2]
Desert woodrats range from southeastern Oregon and southwestern Idaho, south through Nevada and western Utah to California in the US, and Baja California and extreme northwestern Sonora in Mexico. [1] They are generally found in sagebrush scrub areas, in chaparral, and in deserts and rocky slopes with scattered cactus, yucca, pine/juniper, and other low vegetation, at elevations up to 2,900 m (9,500 ft). [2] They are most abundant in rocky areas with numerous crevices or rock piles in which they can seek shelter from predators. [3]
Twenty three subspecies were recognised, many of them restricted to small islands in the Gulf of California. [2] However, Neotoma insularis (Townsend, 1912), is now recognized to be distinct from N. lepida following the ASM and IUCN assessments. [4] [5]
They feed on beans and leaves of mesquite, on juniper, and on parts of available cacti, apparently without getting injured by the spines. They also eat creosote bushes, thistles, Ephedra , Mustard plants, sagebrush, and buckwheat. They will also eat other green vegetation, seeds, fruits, acorns, and pine nuts. In desert habitats, they are highly dependent upon prickly pear cacti for water balance, although they can be sustained on creosote year-round. [2] Although they are capable of eating food containing high levels of resins and oxalic acid, such as the leaves of creosote bushes, [6] these affect their water balance and limit their ability to eat other foods, limiting the growth of the woodrats' population in areas where such plants are common. [7]
Predators include snakes, owls, hawks, coyotes, foxes, weasels, and other carnivorous mammals. They are also commonly parasitized by bot fly larvae.
Desert woodrats breed in the spring and summer, and give birth to litters of up to five young after a gestation period of 30 to 36 days. The young weigh about 10 g (0.35 oz) at birth, and are blind, with only the tips of their hairs visible. Their eyes open after about ten days. The teeth of newborn desert woodrats are initially splayed apart, creating a hexagonal opening between them, with which they clamp themselves to their mother's teats so firmly that they are difficult to separate. The teeth achieve their normal shape after about twelve days, but the young are not completely weaned until around four weeks of age. [2] They live up to five years in captivity. [8]
Desert woodrats are primarily nocturnal [9] and are aggressively solitary. They may defend water sources, such as succulent plants, against other species, and perhaps prevent other species from obtaining water during droughts.[ citation needed ]
Desert woodrats sometimes appropriate the burrows of ground squirrels or kangaroo rats,[ citation needed ] and will fortify the entrance with several cubic metres of sticks and joints collected from jumping and teddy-bear chollas. This provides a formidable defense against predators. Living quarters are also often built against rock crevices, at the base of creosote or cactus plants, or in the lower branches of trees. [2] Rock crevices appear preferred where available, but pack rats generally adapt to any situation.
Woodrats construct houses for nesting, food caching, and predator escape. These can have up to six entrances and eight internal chambers, including both nests and food caches. Houses 36 cm (14 in) high and around 100 cm (39 in) across at the base are not unusual. [2] Nests are constructed of dried vegetation, usually fibrous grass parts or shredded stems.
Males mark their territory by rubbing themselves on the ground, depositing musky sebum secreted by large sebaceous glands on their abdomen. Females, however, scent mark by first digging, and then rubbing their flanks, legs or cheeks on the excavated soil. [10] They are active year-round.
The eastern woodrat, also known as the Florida woodrat or bush rat, is a pack rat native to the central and Eastern United States. It constructs large dens that may serve as nests for many generations and stores food in outlying caches for the winter. While widespread and not uncommon, it has declined or disappeared in several areas.
The Mexican woodrat is a medium-sized pack rat.
Ord's kangaroo rat is a kangaroo rat native to western North America, specifically the Great Plains and the Great Basin, with its range extending from extreme southern Canada to central Mexico.
The Allegheny woodrat, is a species of "pack rat" in the genus Neotoma. Once believed to be a subspecies of the eastern woodrat, extensive DNA analysis has proven it to be a distinct species.
The desert pocket mouse is a North American species of heteromyid rodent found in the southwestern United States and Mexico. True to its common name, the medium-sized desert pocket mouse prefers sandy, sparsely vegetated desert environments.
The white-throated woodrat is a species of rodent in the family Cricetidae. It is found from central Mexico north to Utah and Colorado in the United States. It is primarily a western species in the United States, extending from central Texas west to southeastern California. Populations east of the Rio Grande in New Mexico and Trans-Pecos Texas, previously considered to be variants of the white-throated woodrat, have since 1988 been assigned to the white-toothed woodrat.
Anthony's woodrat is an extinct subspecies of Bryant's woodrat in the family Cricetidae. It was found only on Isla Todos Santos in Baja California, Mexico. It is thought to have been driven to extinction through predation from feral cats.
Bryant's woodrat is a species of new-world rodent in the family Cricetidae native to the Southwestern United States and Mexico.
The bushy-tailed woodrat, or packrat is a species of rodent in the family Cricetidae found in Canada and the United States. Its natural habitats are boreal forests, temperate forests, dry savanna, temperate shrubland, and temperate grassland.
The dusky-footed woodrat is a species of nocturnal rodent in the family Cricetidae. They are commonly called "packrats" or "trade rats" and build large, domed dens that can reach several feet in height. Coyotes and other predators will attempt to prey on these rodents by laying waste to the dens, but the sheer volume of material is usually dissuasive. Occasionally, dusky-footed woodrats will build satellite dens in trees. Although these animals are solitary, except in the mating season, dens are frequently found in clusters of up to several dozen, forming rough "communities". The mating system in this species appears to be variable, with promiscuity most generally at high population densities and monogamy at lower densities.
Nelson's woodrat is a species of rodent in the family Cricetidae. It is endemic to Mexico, where it is known only from the eastern slopes of the volcanoes Orizaba and Cofre de Perote. Due to the small geographic range, isolation, and low population, the Nelson's woodrat has a higher risk for extinction. The distribution and population sizes are small. The population exists in geographic isolation, which prevents gene flow
Stephen's woodrat is a species of rodent in the family Cricetidae found in Arizona, New Mexico and Utah in the United States.
The desert kangaroo rat is a rodent species in the family Heteromyidae that is found in desert areas of southwestern North America. It is one of the large kangaroo rats, with a total length greater than 12 inches (300 mm) and a mass greater than 3.2 ounces (91 g).
The San José Island kangaroo rat is a subspecies of rodent in the family Heteromyidae. It is endemic to Mexico, where it is found only on San José Island off the east coast of Baja California Sur. is restricted to an area of only 30 km2 in the southwestern coast of San José Island, Lower California, with the population having been drastically reduced in size and being close to extinction No other species of Dipodomys occur in sympatry with D. insularis.
The black jackrabbit is a species of mammal in the family Leporidae. Endemic to Mexico, its only known location is Espiritu Santo Island in the Gulf of California. The IUCN has listed this species as a "vulnerable species" because of its restricted range. This taxon is regarded by some authorities as being a subspecies of the black-tailed jackrabbit, found on the mainland of Mexico.
The Sierra del Tontal chinchilla rat is a species of chinchilla rat. Found only in Argentina, this species was once thought to be part of Abrocoma cinerea. In 2002, Braun and Mares from the University of Oklahoma confirmed it to be a separate species.
Neotoma leucodon is a species of rodent in the family Cricetidae. Although originally named from San Luis Potosí, Mexico, as a species by Clinton Hart Merriam, the white-toothed woodrat was long considered to be a synonym of the white-throated woodrat. Molecular data, however, indicate the populations east of the Rio Grande in New Mexico and Trans-Pecos Texas represent a different species than morphologically similar populations west of the river.
The big-eared woodrat is a nocturnal rodent of the woodrat genus Neotoma, in the family Cricetidae. Closely related to, and formerly included in the species Neotoma fuscipes, it is endemic to western North America and occurs west and south of the Salinas Valley from the California Coast Ranges south of Monterey Bay to northern Baja California, as well as in the Sierra Nevada, extending north to the South Fork American River.
A pack rat or packrat, also called a woodrat or trade rat, are any species in the North and Central American rodent genus Neotoma. Pack rats have a rat-like appearance, with long tails, large ears, and large, black eyes. Pack rats are noticeably larger than deer mice, harvest mice, and grasshopper mice, and are usually somewhat larger than cotton rats.
Neotoma insularis, the Angel de la Guarda woodrat, is a species of rodent in the family Cricetidae. It is found in the Mexican state of Baja California on Angel de la Guarda Island.
