Ammospermophilus harrisii (Information about this image)
Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Megaclassis: Osteichthyes
Cladus: Sarcopterygii
Cladus: Rhipidistia
Cladus: Tetrapodomorpha
Cladus: Eotetrapodiformes
Cladus: Elpistostegalia
Superclassis: Tetrapoda
Cladus: Reptiliomorpha
Cladus: Amniota
Cladus: Synapsida
Cladus: Eupelycosauria
Cladus: Sphenacodontia
Cladus: Sphenacodontoidea
Cladus: Therapsida
Cladus: Theriodontia
Cladus: Cynodontia
Cladus: Mammaliaformes
Classis: Mammalia
Subclassis: Trechnotheria
Infraclassis: Zatheria
Supercohort: Theria
Cohort: Eutheria
Cohort: Placentalia
Cladus: Boreoeutheria
Superordo: Euarchontoglires
Ordo: Rodentia
Subordo: Sciuromorpha
Familia: Sciuridae
Subfamilia: Xerinae
Tribus: Marmotini
Genus: Ammospermophilus
Species: Ammospermophilus harrisii
Subspecies: A. h. harrisii – A. h. saxicolus
Name
Ammospermophilus harrisii Audubon and Bachman, 1854
References
Ammospermophilus harrisii in Mammal Species of the World.
Wilson, Don E. & Reeder, DeeAnn M. (Editors) 2005. Mammal Species of the World – A Taxonomic and Geographic Reference. Third edition. ISBN 0-8018-8221-4.
Links
North American Mammals: Ammospermophilus harrisii [1]
Vernacular names
English: Harris's Antelope Squirrel, Yuma Antelope Squirrel
日本語: ハリスレイヨウジリス
Harris's antelope squirrel (Ammospermophilus harrisii) is a species of rodent in the family Sciuridae.[2] It is found in Arizona and New Mexico in the United States, and in Sonora in Mexico. They are adapted to hot weather conditions including a technique called "heat dumping". They have a wide-ranging diet, including both vegetation, insects, small rodents and carrion.
Taxonomy and description
A. harrisii holding its tail over its back
The species is named after Edward Harris.[3] Examples of A. harrisii have distinctive markings on their grey fur, with brown highlights on the sides and legs and a white strip down the side of the torso and encircling their eyes.[4] Their fur grows longer in the winter than it does in the summer.[3] Adults weigh around 4–5 ounces (110–140 g), and measure 8.5–10 inches (22–25 cm) minus their tail, which measures 3–4 inches (7.6–10.2 cm).[4] They can be mistaken for chipmunks.[5]
A. harrisii has a high body temperature of 97-107 degrees Fahrenheit (36.7 - 41.6 °C) [5] In order to protect itself from the heat of the Sonoran Desert, A. harrisii carries their tails over their bodies in order to provide shade.[4] A. harrisii also participates in a heat reduction method where individuals move into shaded positions and lie spread eagled against the ground. This is referred to as "heat dumping".[4] They are active during the day, and do not sweat but otherwise reduce temperature by salivating.[5]
The optimum reproductive period for A. harrisii is between February and March although mating can take place between December and June. Gestation lasts thirty days, and females usually have one litter per year with an average of 6.5 pups. Newborns grow to adult size at around 217 days after birth. Both males and females reach sexual maturity during the first year.[3]
Habitat
The habitat of A. harrisii ranges across the Southwestern United States, specifically in Arizona and the southwest of New Mexico. The range extends outside the US into Mexico into the northwest of the state of Sonora. They are designated as a non-game animal by the Arizona Game and Fish Department.[4] While the species is not endangered, the range of its habitats is being reduced by human developments.[5]
Their diet includes the fruit and seeds of local cactus plants, as well as beans of the mesquite plant. They do not only eat vegetation, and also consume insects, small rodents and carrion.[4][5] They have a variety of predators including the bobcat, coyotes, as well as local snakes and domestic animals such as dogs and cats.[4]
References
Timm, R.; Álvarez-Castañeda, S.T.; Castro-Arellano, I.; Lacher, T. (2017) [errata version of 2016 assessment]. "Ammospermophilus harrisii". IUCN Red List of Threatened Species. 2016: e.T42399A115189204. doi:10.2305/IUCN.UK.2016-3.RLTS.T42399A22251385.en. Retrieved 10 March 2022.
Thorington, R.W., Jr.; Hoffman, R.S. (2005). "Family Sciuridae". 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. 797. ISBN 978-0-8018-8221-0. OCLC 62265494.
Shah, Amy. "Ammospermophilus harrisii Harris's antelope squirrel". Animal Diversity Web. Retrieved 12 January 2013.
"Animal Fact Sheet: Harris's Antelope Squirrel". Arizona-Sonora Desert Museum. Retrieved 12 January 2013.
"Harris's Antelope Squirrel". Los Angeles Zoo & Botanical Gardens. Archived from the original on 20 January 2013. Retrieved 12 January 2013.
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