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{{short description|Tribe of mammals (rodent (marmot))}}
{{Other uses}}
{{pp-semi-indef|small=yes}}
{{Paraphyletic group
| name = Chipmunk
| fossil_range = Early [[Miocene]] to Recent
| image = Chipmunk with stuffed cheeks in Prospect Park (05980).jpg
| image_caption = [[Eastern chipmunk]] (''Tamias striatus'')
| auto = yes
| parent = Marmotini 
| authority = [[Johann Karl Wilhelm Illiger|Illiger]], 1811<ref>{{cite book|last1=Illigeri|first1=Caroli|title=Prodromus systematis mammalium et avium|date=1811|publisher=C. Salfeld|location=Berlin|page=83|chapter-url=https://www.biodiversitylibrary.org/page/48453788|chapter=Genus 34. Tamias (''ταμιας'' promus condus) Bakkenhörnchen}}</ref>
| subdivision_ranks = Genera
| subdivision = 3, see [[#Species|text]]
}}

'''Chipmunks''' are small, striped [[rodents]] of [[Sciuridae]], the squirrel family; specifically, they are [[ground squirrel]]s (Marmotini). Chipmunks are found in [[North America]], with the exception of the [[Siberian chipmunk]] which is found primarily in [[Asia]].

==Taxonomy and systematics==
Chipmunks may be classified either as a single genus, ''Tamias'', or as three genera: ''[[Tamias]]'', of which the [[eastern chipmunk]] (''T. striatus'') is the only living member; ''[[Eutamias]]'', of which the [[Siberian chipmunk]] (''E. sibiricus'') is the only living member; and ''[[Neotamias]]'', which includes the 23 remaining, mostly western North American, species. These classifications were treated as subgenera due to the chipmunks' morphological similarities.<ref name=Patterson>{{cite journal |journal=Mammalia |year=2016 |volume=80 |issue=3 |pages=241–251 |title=Towards a uniform nomenclature for ground squirrels: the status of the Holarctic chipmunks |last1=Patterson|first1=Bruce D. |last2=Norris|first2=Ryan W. |doi=10.1515/mammalia-2015-0004 |s2cid=9955150 |url=https://www.webpages.uidaho.edu/~jacks/PattersonNorris.16.pdf |archive-url=https://web.archive.org/web/20190608182301/https://www.webpages.uidaho.edu/~jacks/PattersonNorris.16.pdf |archive-date=2019-06-08 |url-status=live |access-date=2019-06-08}}</ref>
As a result, most taxonomies over the twentieth century have placed the chipmunks into a single genus. However, studies of [[mitochondrial DNA]] show that the divergence between each of the three chipmunk groups is comparable to the genetic differences between ''[[Marmot]]a'' and ''[[Spermophilus]]'',<ref name=Patterson/><ref>{{cite web | url = http://nmnhgoph.si.edu/msw/ | title = Mammal Species of the World | access-date = 2007-06-27 | author = Wilson, D. E. |author2=D. M. Reeder | year = 2005 |archive-url = https://web.archive.org/web/20070623030727/http://nmnhgoph.si.edu/msw/ |archive-date = 2007-06-23}}</ref><ref>{{cite journal|last1=Piaggio|first1= A. J. |last2= Spicer|first2= G. S.|year= 2001|title=Molecular phylogeny of the chipmunks inferred from mitochondrial cytochrome ''b'' and cytochrome oxidase II gene sequences|journal=Molecular Phylogenetics and Evolution|volume= 20|issue= 3 |pages= 335–350|url=http://online.sfsu.edu/~gs/spicer/pages/spicerpdf/piaggio01.pdf |archive-url=https://web.archive.org/web/20120823153636/http://online.sfsu.edu/~gs/spicer/pages/spicerpdf/piaggio01.pdf |archive-date=2012-08-23 |url-status=live|doi=10.1006/mpev.2001.0975|pmid= 11527462 |bibcode= 2001MolPE..20..335P |citeseerx= 10.1.1.330.9046 }}</ref><ref>{{cite journal|journal=Journal of Mammalian Evolution|volume= 7|issue=3|year=2000|title=Molecular Phylogeny of the Chipmunk Genus ''Tamias'' Based on the Mitochondrial Cytochrome Oxidase Subunit II Gene|first1=Antoinette J.|last1=Piaggio|first2=Greg S. |last2=Spicer|url=http://userwww.sfsu.edu/~gs/spicer/pages/spicerpdf/piaggio00.pdf |archive-url=https://web.archive.org/web/20110913140312/http://userwww.sfsu.edu/~gs/spicer/pages/spicerpdf/piaggio00.pdf |archive-date=2011-09-13 |url-status=live|doi=10.1023/a:1009484302799|pages=147–166|s2cid= 7623018}}</ref><ref>{{cite journal|last1=Musser|first1= G. G.|last2=Durden|first2= L. A.|last3= Holden|first3= M. E.|last4= Light|first4= J. E.|year=2010|title=Systematic review of endemic Sulawesi squirrels (Rodentia, Sciuridae), with descriptions of new species of associated sucking lice (Insecta, Anoplura), and phylogenetic and zoogeographic assessments of sciurid lice|journal=Bulletin of the American Museum of Natural History|volume= 339|issue= 339|pages= 1–260|hdl= 2246/6067|doi= 10.1206/695.1|s2cid= 82712592|url= http://digitallibrary.amnh.org/bitstream/2246/6067/1/B339.pdf |archive-url=https://web.archive.org/web/20180430025925/http://digitallibrary.amnh.org/bitstream/2246/6067/1/B339.pdf |archive-date=2018-04-30 |url-status=live}}</ref> so the three genera classifications have been adopted here.

<gallery mode="packed">
Tamias striatus2.jpg|''[[Tamias striatus]]'', Eastern chipmunk
Streifenhoernchen.jpg|''[[Eutamias sibiricus]]'', Siberian chipmunk
Tamias minimus.jpg|''[[Neotamias minimus]]'', Least chipmunk
</gallery>

The common name originally may have been spelled "chitmunk", from the native [[Ottawa language|Odawa]] (Ottawa) word ''jidmoonh'', meaning "red squirrel" (''cf.'' [[Anishinaabe language#Anishinaabemowin|Ojibwe]] {{lang|oj|ᐊᒋᑕᒨ}} ''ajidamoo'').<ref>{{cite web|url=http://etymonline.com/index.php?term=chipmunk |title=Online Etymology Dictionary |publisher=Etymonline.com |access-date=7 December 2012}}</ref><ref>Nichols, John D. and Earl Nyholm (1995). ''A Concise Dictionary of Minnesota Ojibwe''. Minneapolis: University of Minnesota Press.</ref> The earliest form cited in the ''[[Oxford English Dictionary]]''  is "chipmonk", from 1842. Other early forms include "chipmuck" and "chipminck", and in the 1830s they were also referred to as "chip squirrels", probably in reference to the sound they make. In the mid-19th century, [[John James Audubon]] and his sons included a lithograph of the chipmunk in their ''Viviparous Quadrupeds of North America'', calling it the "chipping squirrel [<span class="ltr">or</span>] hackee".<ref>{{Cite book  | last1 = Audubon  | first1 = John James  | last2 = Bachman  | first2 = John  | title = Imperial Collection of Audubon Mammals  | publisher = Bonanza Books, a division of [[Crown Publishing Group]]  | year = 1967  | location = New York  | page = 52}}</ref> Chipmunks have also been referred to as "ground squirrels"<ref>{{Cite EB1911|wstitle=Ground-squirrel|volume=12|page=626}}</ref> (although the name "ground squirrel" may refer to other squirrels, such as those of the genus ''[[Spermophilus]]'').<ref name=Krystufek2013>{{cite journal | author1=Kryštufek, B. | author2=B. Vohralík | year=2013 | title=Taxonomic revision of the Palaearctic rodents (Rodentia). Part 2. Sciuridae: Urocitellus, Marmota and Sciurotamias | journal=Lynx, N. S. (Praha) | volume=44 | pages=22 }}</ref>

==Diet==
[[File:Tamia striatus eating.jpg|thumb|left|An eastern chipmunk placing food in its cheek pouch]]
Chipmunks have an [[omnivore|omnivorous]] diet primarily consisting of seeds, [[nut (fruit)|nuts]] and other fruits, and [[bud]]s.<ref name=hazard/><ref name=WVDNR/> They also commonly eat grass, shoots, and many other forms of plant matter, as well as [[fungi]], insects and other [[arthropod]]s, small frogs, worms, and bird eggs. They will also occasionally eat newly hatched baby birds.<ref name=hazard/><ref name=WVDNR/><ref>{{cite web|url=http://www.nhptv.org/natureworks/chipmunk.htm |title=Eastern Chipmunk - Tamias striatus - NatureWorks |publisher=Nhptv.org |access-date=2012-12-07}}</ref><ref>{{cite iucn|url=https://www.iucnredlist.org/details/42572/0|title=Tamias minimus|author1=Linzey, A.V.|author2=NatureServe|year=2008|access-date=2012-08-29}}</ref><ref>{{cite iucn|url=https://www.iucnredlist.org/details/21360/0|title=Tamias sibiricus|author1=Linzey, A.V.|author2=NatureServe|year=2008|access-date=2012-08-29}}</ref><ref>{{cite iucn|title=Tamias townsendi|url=https://www.iucnredlist.org/details/42584/0|author1=Linzey, A.V.|author2=NatureServe|year=2008|access-date=2012-08-29}}</ref> Around humans, chipmunks can eat cultivated grains and vegetables, and other plants from farms and gardens, so they are sometimes considered pests.<ref name=hazard/><ref>{{cite web |url=http://www.massaudubon.org/Nature_Connection/wildlife/index.php?subject=Mammals&id=22 |title=Chipmunks &#124; Living With Wildlife |publisher=Mass Audubon |access-date=2012-12-07 |archive-url=https://web.archive.org/web/20121218031247/http://www.massaudubon.org/Nature_Connection/wildlife/index.php?subject=Mammals&id=22 |archive-date=2012-12-18 |url-status=dead }}</ref> Chipmunks mostly forage on the ground, but they climb trees to obtain nuts such as [[hazelnut]]s and [[acorn]]s.<ref name=hazard/><ref>{{cite web|url=http://www.animalcorner.co.uk/wildlife/chipmunk.html |title=Chipmunk at Animal Corner |publisher=Animalcorner.co.uk |date=2004-01-01 |access-date=2012-12-07}}</ref> At the beginning of autumn, many species of chipmunk begin to [[hoarding (animal behavior)|stockpile]] nonperishable foods for winter. They mostly cache their foods in a larder in their burrows and remain in their nests until spring, unlike some other species which make multiple small caches of food.<ref name=hazard/> [[Cheek pouches]] allow chipmunks to carry food items to their burrows for either storage or consumption.<ref name=WVDNR>{{cite web|url=http://www.wvdnr.gov/Wildlife/Magazine/Archive/04Fall/Eastern_Chipmunk.shtm |title=West Virginia Wildlife Magazine: Wildlife Diversity Notebook. Eastern chipmunk |publisher=Wvdnr.gov |access-date=2012-12-07}}</ref>

==Ecology and life history==
[[File:Chimps2.theora.ogv|thumb|Chipmunks in northern [[Wisconsin]]]]
[[File:Chipmunk-burrow (exits).jpg|thumb|Eastern chipmunk at the entrance of its burrow]]
Eastern chipmunks, the largest of the chipmunks,<ref>{{Cite web|title=National Geographic|website=[[National Geographic Society]] |date=11 April 2010 |url=https://www.nationalgeographic.com/animals/mammals/facts/chipmunks|url-status=dead|archive-url=https://web.archive.org/web/20210301043528/https://www.nationalgeographic.com/animals/mammals/facts/chipmunks |archive-date=2021-03-01 }}</ref> mate in early spring and again in early summer, producing litters of four or five young twice each year.<ref name=hazard>{{cite book | last = Hazard | first = Evan B.  | title = The Mammals of Minnesota | publisher = University of Minnesota Press | year = 1982 | pages =  52–54 | url = https://books.google.com/books?id=sjoQK1bedB0C&q=eastern+chipmunk+mate&pg=PA53 | isbn  = 978-0-8166-0952-9}}</ref> Western chipmunks breed only once a year. The young emerge from the burrow after about six weeks and strike out on their own within the next two weeks.<ref>{{cite book | last = Schwartz | first = Charles Walsh  |author2=Elizabeth Reeder Schwartz |author3=Jerry J. Conley  | title = The Wild Mammals of Missouri | publisher = University of Missouri Press | year = 2001 | pages =  135–140 | url = https://books.google.com/books?id=uEWl0ZM6DfUC&q=eastern+chipmunk+young&pg=PA140 | isbn  = 978-0-8262-1359-4}}</ref>

These small mammals fulfill several important functions in [[forest]] [[ecosystem]]s. Their activities harvesting and hoarding tree seeds play a crucial role in [[seedling]] establishment. They consume many different kinds of [[fungi]], including those involved in [[Mycorrhiza|symbiotic mycorrhizal associations]] with trees, and are an important [[dispersal vector|vector for dispersal]] of the spores of subterranean [[Sporocarp (fungi)|sporocarps]] (truffles) which have co-evolved with these and other [[wikt:mycophagous|mycophagous]] mammals and thus lost the ability to disperse their spores through the air.<ref>{{cite book | last = Apostol | first = Dean  |author2=Marcia Sinclair | title = Restoring the Pacific Northwest: The Art and Science of Ecological Restoration in Cascadia | publisher = Island Press | year = 2006 | page =  112 | url = https://books.google.com/books?id=CsGyhzFBjyAC&q=chipmunk+sporocarps&pg=PA112| isbn  = 978-1-55963-078-8}}</ref>{{Failed verification |date=April 2017|reason=The citation only discusses northern flying squirrels eating the truffles.  Chipmunks are merely mentioned as part of the above-ground food web, providing food for spotted owls, and the repetition of northern flying squirrels in that trio indicates they are not saying the  Townsend's chipmunks are equivalent consumers in the food web.  Chipmunks probably do eat truffles too, but this source does not say so.}}

Chipmunks construct extensive [[burrow]]s which can be more than {{convert|3.5|m|ft|abbr=on}} in length with several well-concealed entrances.<ref>{{cite web | url=http://www.esf.edu/aec/adks/mammals/chipmunk.htm | title=Eastern Chipmunk | publisher=Adirondack Ecological Center | work=Adirondack Mammals | date=1988 | access-date=2015-09-19 | author=Saunders, D. A.}}</ref> The sleeping quarters are kept clear of shells, and feces are stored in refuse tunnels.<ref>{{cite book | url=https://books.google.com/books?id=D9fWfWLmMcIC&q=chipmunk+refuse+tunnel&pg=PA250 | title=Field Guide to the Natural World of New York City | publisher=Johns Hopkins University Press | isbn=9780801886829 | date=October 2007 | access-date=2015-09-19 | author=Leslie Day}}</ref>

The eastern chipmunk [[hibernation|hibernates]] in the winter, while western chipmunks do not, relying on the stores in their burrows.<ref>{{cite book|last1=Kays|first1=R. W.|first2=Don E.|last2=Wilson|year=2009|publisher=Princeton University Press|title=Mammals of North America|edition=2nd|isbn=978-0-691-14092-6|page=72}}</ref>

Chipmunks play an important role as prey for various predatory mammals and birds but are also opportunistic predators themselves, particularly with regard to bird eggs and [[nestling]]s, as in the case of [[eastern chipmunk]]s and [[mountain bluebird]]s (''Siala currucoides'').<ref>{{cite web|last1=Sullivan|first1=Janet|title=WILDLIFE SPECIES: Sialia currucoides|url=https://www.fs.fed.us/database/feis/animals/bird/sicu/all.html|website=Fire Effects Information System, [Online]|publisher=U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory|access-date=23 January 2016}}</ref>

Chipmunks typically live about three years, although some have been observed living to nine years in captivity.<ref>{{cite web |url=http://www.essortment.com/information-chipmunks-56048.html |title=Information on Chipmunks |publisher=Essortment.com |date=1986-05-16 |access-date=2012-12-07 |archive-date=2012-12-22 |archive-url=https://web.archive.org/web/20121222102625/http://www.essortment.com/information-chipmunks-56048.html |url-status=dead }}</ref>

Chipmunks are [[Diurnality|diurnal]]. In captivity, they are said to sleep for an average of about 15 hours a day. It is thought that mammals which can sleep in hiding, such as rodents and bats, tend to sleep longer than those that must remain on alert.<ref>"40 Winks?" Jennifer S. Holland,'' National Geographic'' Vol. 220, No. 1. July 2011.</ref>

==Genera==
Genus ''[[Eutamias]]''
* [[Siberian chipmunk]], ''Eutamias sibiricus''

Genus ''[[Tamias]]''<ref>[https://www.departments.bucknell.edu/biology/resources/msw3/browse.asp?id=12401131 ''Tamias''], Mammal Species of the World, 3rd ed.</ref>
* [[Eastern chipmunk]], ''Tamias striatus''
* †''[[Tamias aristus]]''

Genus ''[[Neotamias]]''
* [[Allen's chipmunk]], ''Neotamias senex''
* [[Alpine chipmunk]], ''Neotamias alpinus''
* [[Buller's chipmunk]], ''Neotamias bulleri''
* [[California chipmunk]], ''Neotamias obscurus''
* [[Cliff chipmunk]], ''Neotamias dorsalis''
* [[Colorado chipmunk]], ''Neotamias quadrivittatus''
* [[Durango chipmunk]], ''Neotamias durangae''
* [[Gray-collared chipmunk]], ''Neotamias cinereicollis''
* [[Gray-footed chipmunk]], ''Neotamias canipes''
* [[Hopi chipmunk]],  ''Neotamias rufus''
* [[Least chipmunk]], ''Neotamias minimus''
* [[Lodgepole chipmunk]],  ''Neotamias speciosus''
* [[Long-eared chipmunk]], ''Neotamias quadrimaculatus''
* [[Merriam's chipmunk]], ''Neotamias merriami''
* [[Palmer's chipmunk]], ''Neotamias palmeri''
* [[Panamint chipmunk]], ''Neotamias panamintinus''
* [[Red-tailed chipmunk]],  ''Neotamias ruficaudus''
* [[Siskiyou chipmunk]],  ''Neotamias siskiyou''
* [[Sonoma chipmunk]],  ''Neotamias sonomae''
* [[Townsend's chipmunk]],  ''Neotamias townsendii''
* [[Uinta chipmunk]],  ''Neotamias umbrinus''
* [[Yellow-cheeked chipmunk]], ''Neotamias ochrogenys''
* [[Yellow-pine chipmunk]],  ''Neotamias amoenus''

== In popular culture ==

* [[Alvin and the Chipmunks]], an animated virtual band
* [[Chip 'n' Dale]], cartoon Disney chipmunks

==References==
{{Reflist}}

==Further reading==
* Baack, Jessica K. and Paul V. Switzer. "Alarm Calls Affect Foraging Behavior in Eastern Chipmunks (Tamias Striatus, Rodentia: Sciuridae)." ''Ethology.'' Vol. 106. Dec. 2003. 1057–1066.
* Gordon, Kenneth Llewellyn. ''The Natural History and Behavior of the Western Chipmunk and the Mantled Ground Squirrel.'' Oregon: 1943

==External links==
* {{webarchive |url=https://web.archive.org/web/20080424111229/http://www.britishcolumbia.com/Wildlife/wildlife/landmammals/cw/cw_chipmunk.html |date=April 24, 2008 |title=Wildlife and Nature – Chipmunk }}

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[[Category:Extant Miocene first appearances]]
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