Southern pocket gopher

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Southern pocket gopher
Thomomys umbrinus imported from iNaturalist photo 7206141 on 28 January 2020.jpg
Photo of Thomomys umbrinus
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Rodentia
Family: Geomyidae
Genus: Thomomys
Species:
T. umbrinus
Binomial name
Thomomys umbrinus
(Richardson, 1829)

The southern pocket gopher (Thomomys umbrinus) is a species of rodent in the family Geomyidae. [2] It is found in Mexico and the United States, usually in high altitude grassland and shrubland. It feeds on plant material and has an extensive burrow above which is a large heap of earth on the surface of the ground.

Description

There are a number of subspecies of the southern pocket gopher and they vary in details of their size, the proportions of their skull and their coloring. Adults are commonly between 200 and 250 mm (8 and 10 in) long, with females being generally smaller than males. The upperparts are cinnamon-brown fading to yellowish-buff on the flanks. There are black-tipped hairs on the head making it appear darker, the ears are black and there is a black patch behind the ear. There is white on the cheeks and throat and the underparts are yellowish-buff. The upper surface of the tail is brown and the underside yellowish-buff except for the tip which is white all round. [3] [4]

Distribution and habitat

The southern pocket gopher is native to Mexico and the extreme southwestern United States. Its range extends from the states of Puebla and Veracruz in Mexico northwards to the states of Arizona and New Mexico in the United States. Its typical habitat is high altitude grassland and shrubland, and lower altitude desert grassland and woodland. Its presence in an area can be told from the mounds of soil it throws up during its burrowing activities. [1]

Ecology

The southern pocket gopher does not hibernate and is active at most times of day throughout the year. It feeds on plant material which it finds both above and below the surface of the ground. Predators include owls, hawks, snakes, bobcats, coyotes, weasels and badgers. Life expectancy is probably two to three years. [4] The yellow-nosed cotton rat (Sigmodon ochrognathus) often shares its burrow. [5]

Breeding takes place at differing times of year in different parts of the range. In Arizona, a single litter of usually four or five (but up to ten) young are born in late winter or early spring. [1]

Status

The southern pocket gopher is plentiful in suitable habitat over most of its range although some populations are small and may come and go. The population trend is unknown but no specific threats have been identified and the IUCN has listed this animal's conservation status as being of "least concern". [1]

Related Research Articles

<span class="mw-page-title-main">Gopher</span> Family of burrowing rodents

Pocket gophers, commonly referred to simply as gophers, are burrowing rodents of the family Geomyidae. The roughly 41 species are all endemic to North and Central America. They are commonly known for their extensive tunneling activities and their ability to destroy farms and gardens.

<span class="mw-page-title-main">Cotton rat</span> Genus of rodents

A cotton rat is any member of the rodent genus Sigmodon. Their name derives from their damaging effects on cotton as well as other plantation crops, such as sugarcane, corn, peanut and rice. Cotton rats have small ears and dark coats, and are found in North and South America. Members of this genus are distributed in the Southwestern United States, Mexico, Central America, and South American countries of: Venezuela, Ecuador, Colombia, Peru, Brazil, Guyana, and Suriname. Many of the species are found in Mexico.

<span class="mw-page-title-main">Smooth-toothed pocket gopher</span> Genus of mammals

The smooth-toothed pocket gophers, genus Thomomys, are so called because they are among the only pocket gophers without grooves on their incisors. They are also called the western pocket gophers because they are distributed in western North America. They are considered distinct enough from other pocket gophers to be recognized as a separate subfamily or tribe.

<span class="mw-page-title-main">Botta's pocket gopher</span> Species of mammal

Botta's pocket gopher is a pocket gopher native to western North America. It is also known in some areas as valley pocket gopher, particularly in California. Both the specific and common names of this species honor Paul-Émile Botta, a naturalist and archaeologist who collected mammals in California in 1827 and 1828.

<span class="mw-page-title-main">Hispid cotton rat</span> Species of rodent

The hispid cotton rat is a rodent species long thought to occur in parts of South America, Central America, and southern North America. However, recent taxonomic revisions, based on mitochondrial DNA sequence data, have split this widely distributed species into three separate species. The distribution of S. hispidus ranges from Arizona in the west to Virginia to the east and from the Platte River in Nebraska in the north to, likely, the Rio Grande in the south, where it meets the northern edge of the distribution of S. toltecus. Adult size is total length 202–340 mm (8.0–13.4 in); tail 87–122 mm (3.4–4.8 in), frequently broken or stubbed; hind foot 29–35 mm (1.1–1.4 in); ear 16–20 mm (0.63–0.79 in); mass 50–250 g (1.8–8.8 oz). They have been used as laboratory animals.

<span class="mw-page-title-main">Yellow-nosed cotton rat</span> Species of rodent

The yellow-nosed cotton rat is a species of rodent in the family Cricetidae. It is native to Mexico and to the states of Arizona, New Mexico, and Texas in the United States, where it inhabits mountain grassland, scrub, and pinyon-juniper woodland. It is common over much of its wide range and the IUCN considers it to be of "least concern".

<span class="mw-page-title-main">Banner-tailed kangaroo rat</span> Species of rodent

The banner-tailed kangaroo rat is a species of rodent in the family Heteromyidae. It is found in arid environments in the southwestern United States and Mexico where it lives in a burrow by day and forages for seeds and plant matter by night.

<span class="mw-page-title-main">Plains pocket gopher</span> Species of rodent

The plains pocket gopher is one of 35 species of pocket gophers, so named in reference to their externally located, fur-lined cheek pouches. They are burrowing animals, found in grasslands and agricultural land across the Great Plains of North America, from Manitoba to Texas. Pocket gophers are the most highly fossorial rodents found in North America.

<span class="mw-page-title-main">Silky pocket mouse</span> Species of rodent

The silky pocket mouse is a species of rodent in the family Heteromyidae. It is found in northern and central Mexico and the southwest region of the United States. It is a species of least concern, according to the IUCN, with no known major threats. The silky pocket mouse eats seeds, succulent parts of plants and nuts, and carries food in its cheek pouches. It lives in low valley bottoms with soft soils, among weeds and shrubs, where it burrows in the sand to bury seed caches. The species is more tolerant of harsh habitat conditions than other pocket mice.

<span class="mw-page-title-main">Camas pocket gopher</span> Small species of burrowing rodent from Oregon

The camas pocket gopher, also known as the camas rat or Willamette Valley gopher, is a rodent, the largest member in the genus Thomomys, of the family Geomyidae. First described in 1829, it is endemic to the Willamette Valley of northwestern Oregon in the United States. The herbivorous gopher forages for vegetable and plant matter, which it collects in large, fur-lined, external cheek pouches. Surplus food is hoarded in an extensive system of tunnels. The dull-brown-to-lead-gray coat changes color and texture over the year. The mammal's characteristically large, protuberant incisors are well adapted for use in tunnel construction, particularly in the hard clay soils of the Willamette Valley. The gophers make chattering sounds with their teeth; males and females make purring sounds when they are together, and the young make twittering sounds. Born toothless, blind and hairless, the young grow rapidly before being weaned at about six weeks of age.

<span class="mw-page-title-main">Idaho pocket gopher</span> Species of rodent in the family Geomyidae

The Idaho pocket gopher is a species of rodent in the family Geomyidae. It is rather small, with a lightly built skull. Its fur color varies through the body and between individuals. Found in the western United States, it inhabits savannas, shrubland, and grasslands. Individuals live alone in burrows, staying active year-round. Many aspects of its behavior and biology are not well understood. The species is classified as being of least-concern by the International Union for the Conservation of Nature.

<span class="mw-page-title-main">Mountain pocket gopher</span> Species of mammal

The mountain pocket gopher is a species of rodent in the family Geomyidae. It is endemic to California and Nevada. The Sierra Nevada are part of its range.

<span class="mw-page-title-main">Townsend's pocket gopher</span> Species of pocket gopher endemic to the northwestern United States

Townsend's pocket gopher is a species of pocket gopher endemic to the northwestern United States.

References

  1. 1 2 3 4 Linzey, A. V.; Timm, R.; Álvarez-Castañeda, S. T. & Lacher, T. (2008). "Thomomys umbrinus". IUCN Red List of Threatened Species . 2008. Retrieved 27 August 2014.
  2. Patton, J. L. (2005). "Family Geomyidae". In Wilson, D. E.; Reeder, D. M. (eds.). Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Johns Hopkins University Press. p. 870. ISBN   978-0-8018-8221-0. OCLC   62265494.
  3. Nelson, E. W.; Goldman, E. A. (1934). "Pocket Gophers of the Genus Thomomys of Mexican Mainland and Bordering Territory". Journal of Mammalogy. 15 (2): 105–124. doi:10.2307/1373982. JSTOR   1373982.
  4. 1 2 "Thomomys umbrinus: Southern pocket gopher". North American Mammals. Smithsonian National Museum of Natural History. Retrieved 18 August 2014.
  5. Hoffmeister, Donald F. (1963). "The Yellow-nosed Cotton Rat, Sigmodon ochrognathus, in Arizona". American Midland Naturalist. 70 (2): 429–441. doi:10.2307/2423067. JSTOR   2423067.