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Tamias umbrinus inhabits moderate to high elevation coniferous forests (2000 to 3400 m) typically composed of spruce-fir, Douglas-fir, lodgepole pine, bristlecone, whitebark, ponderosa, limber, foxtail, or drier pinyon pine (Harris, 2004; Streubel, 2000; Montana Fish, Wildlife and Parks, 2005). These chipmunks favor locations near logs and brush in exposed timberline slopes and ridges. The species is primarily arboreal, dwelling in tree cavities where they may sleep or even nest. In addition, individuals of the species may burrow underneath shrubs and rock.
Range elevation: 2000 to 3400 m.
Habitat Regions: temperate ; terrestrial
Terrestrial Biomes: forest ; mountains
Tamias umbrinus is omnivorous and spends the summer months searching for food in trees, snags, shrubs, and on the ground. In the autumn months, extra food is gathered and stored in underground caches to be used during the winter. Uinta chipmunks feed primarily on fruit, conifer mast, and seeds of maple, juniper, and chokecherry. In addition, fungi obtained by digging are a substantial part of ithe diet. Other items occasionally consumed include pollen, buds, insect larvae, and even bird eggs.
Animal Foods: eggs; insects
Plant Foods: seeds, grains, and nuts; fruit; flowers
Other Foods: fungus
Foraging Behavior: stores or caches food
Primary Diet: omnivore
Because chipmunks carry seeds from their source to caches, it is likely that these animals aid in the dispersal of various seeds. Any burrowing done aids in soil aeration. In addition, these animals provide a host for larval cuterebrid bot flies (Cuterebra fontinella).
Ecosystem Impact: disperses seeds; soil aeration
Commensal/Parasitic Species:
There is no direct economic impact of this species on humans. However, indirectly, these chipmunks may be beneficial. Because of their role in seed dispersal, they may help forests to regenerate.
Uinta chipmunks are not known to have negative effects on humans.
Tamias umbrinus is a protected non-game species, but is not in danger of extinction and is fairly abundant where it occurs.
US Federal List: no special status
CITES: no special status
IUCN Red List of Threatened Species: least concern
Communication and perception in this species have not been reported. However, it is likely that Uinta chipmunks are like other western chipmunks in these areas. Most chipmunks use a combination of vocalizations and visual cues, such as body posture and tail positioning, in their communication. There is likely to be tactile communication during mating and rearing of young. The role of olfactory cues has not been examined.
Communication Channels: visual ; tactile ; acoustic
Perception Channels: visual ; tactile ; acoustic ; chemical
Several taxonomic changes have occured that are relevant for T. umbrinus. The genus, Tamias as a whole was formerly known as Eutamias. A sub-species once classified as Eutamius quadrivittatus inyoensis is now placed in T. umbrinus as T. umbrinus inyoensis (Johnson, 1943). It has been suggested that the genus be split into three subgenera, Neotamias, Eutamias, and Tamias, and that both T. umbrinus and T. palmeri be classified as subspecies of Neotamias umbrinus as N. u. umbrinus and N. u. palmeri (Piaggio, 2001).
Uinta chipmunks have been a model for study of territoriality, parapatry, and interspecific competitive exclusion. It has been noted that factors affecting the range of the species include its adaptation to arboreal life and social behavior (see Brown, 1971) or its suceptability to a parasite (Bergstrom, 1992). In the former study, competition with the more aggresive Tamias dorsalis was found to be minimal within the arboreal home range of T. umbrinus, whereas in areas of sparse growth T. dorsalis had a much easier time chasing off Uinta chipmunks. In Bergstrom's study, T. umbrinus was described as the more aggressive species, but showed a higher sensitivity to infestations of larval cuterebrid bot fly common in the lower-elevation territories of two other species.
Uinta chipmunks, Tamias umbrinus, are discontinously distributed in eight western states, including Nevada, Utah, northern Arizona, eastern California, northwestern Colorado, western and southern Wyoming, eastern Idaho, and southern Montana. Specific mountain ranges where T. umbrinus is found are the Beartooth Mountains in Montana; Uinta and Wasatch Mountains in Utah and Wyoming; Salt River, Wind River, Teton, and Absaroka Mountain ranges in Wyoming; Big Hole Mountains in eastern Idaho; and the Inyo, White, and Sierra Nevada mountains in eastern California and western Nevada.
Biogeographic Regions: nearctic (Native )
The lifespan of Tamias umbrinus has not been recorded. However, most chipmunks do not live very long. A wild Tamias rufucaudus is reported to have lived for 8 years, and a captive Tamias townsendii lived over 10 years. Uinta chipmunks are likely to have maximum lifespans no greater than this.
Tamias umbrinus is a medium-sized species of chipmunk with an average total body length of about 225 mm, and an average mass of 59 g. As in other species of Tamias, males are typically somewhat smaller than females. Five subspecies of T. umbrinus have been documented.
It can be difficult to distinguish Uinta chipmunks from other co-occurring species of chipmunks strictly by sight. However, one diagnostic pelage feature is that the light dorsal stripes are white and surround noticeably-broader brown, rather than black, dorsal stripes as in other species of Tamias. In addition, the medial dorsal stripe, unlike several other species of chipmunk, is not black but instead brownish-black. The outermost dark dorsal stripe is very faint or absent. Tamias umbrinus also possesses a dark-brown tail that is held horizontal while running. The ventral pelage is whitish and the flanks are generally brown or cinnamon in color. The species displays smoky gray-brownish pelage on the head and face regions, with blackish ocular stripes, brown submalar stripes, grayish white postauricular patches, and blackish and grayish white coloration on the anterior and posterior part of the ears, respectively. Winter and summer pelage do not differ significantly.
Like other species of chipmunks, T. umbrinus possesses large, fur-lined, cheek pouches for food storage. This enables individuals to gather and store food as they forage and then transport it back to caches for consumption during winter months. This derived characteristic distinguishes chipmunks from the other members of Scuridae. When danger approaches, chipmunks can run at full speed while still retaining the gathered food in their cheek pouches.
Uinta chipmunks hibernate, and so are heterothermic. An individual's body temperature lowers during hiberation. However, because body temperature remains constant both in hibernation and when individuals are active, they are also homoiothermic.
Range mass: 51 to 74 g.
Average mass: 59.3 g.
Range length: 216 to 240 mm.
Average length: 225.9 mm.
Other Physical Features: endothermic ; heterothermic ; homoiothermic; bilateral symmetry
Sexual Dimorphism: female larger
Predators of T. umbrinus include carnivorous mammals such as weasels, coyotes, foxes, bobcats, and birds such as raptors.
Known Predators:
Anti-predator Adaptations: cryptic
Reproductive habits and biology have not been extensively studied in this species, but are likely to be similar to other species of chipmunks in the western region. Once hibernation terminates, nests are built in tree cavities, underground burrows, and even abandoned bird nests. Males may mate with multiple females, and females may also have multiple mates.
Mating System: polygynandrous (promiscuous)
These animals produce one litter per year. Mating typically occurs after animals come out of hibernation in the spring. Litters of 4 to 5 young are born after a gestation of about one month. The mother may nurse the young for one to two months. Young chimpmunks typically disperse before the winter of the year in which they are born. They are usually reproductively mature by the following spring.
Breeding interval: Uinta chipmunks have a single litter per year.
Breeding season: Mating occurs in spring.
Range number of offspring: 4 to 5.
Average gestation period: 30 days.
Average weaning age: 2 months.
Average age at sexual or reproductive maturity (female): 10 months.
Average age at sexual or reproductive maturity (male): 10 months.
Key Reproductive Features: iteroparous ; seasonal breeding ; gonochoric/gonochoristic/dioecious (sexes separate); sexual ; fertilization ; viviparous
Data on the reproduction of these animals is scant. However, they are likely to resemble other members of the genus Tamias in regard to parental care. In most chipmunks for which data exist, female parental care seems to be the rule. Males do not participate in the rearing of the young. The female nurses her young for 1 to 2 months. Young typically disperse before winter.
Parental Investment: altricial ; pre-fertilization (Provisioning, Protecting: Female); pre-hatching/birth (Provisioning: Female, Protecting: Female); pre-weaning/fledging (Provisioning: Female, Protecting: Female); pre-independence (Protecting: Female)
Neotamias umbrinus ye una especie de rucador de la familia Sciuridae endemicu de los Estaos Xuníos.
Prefier vivir en zones subalpinas montes y come granes y frutes, viven nos árboles esvalixaos, parrotales y roques.
L'esquirol llistat de Uinta (Neotamias umbrinus) és una espècie de rosegador de la família dels esciúrids. És endèmica dels Estats Units.[1] Formalment conegut com a Tamias umbrinus,[2] estudis filogenètics han demostrat que és prou diferent de l'esquirol llistat de l'Est americà com per ser ubicat en un gènere separat, Neotamias .[3] Els mateixos estudis també han suggerit que l'esquirol llistat de Palmer en realitat pot ser una subespècie d'esquirol llistat de Uinta, tot i que els dos estan sent generalment considerats com a espècies separades.[4]
L'esquirol llistat de Uinta (Neotamias umbrinus) és una espècie de rosegador de la família dels esciúrids. És endèmica dels Estats Units. Formalment conegut com a Tamias umbrinus, estudis filogenètics han demostrat que és prou diferent de l'esquirol llistat de l'Est americà com per ser ubicat en un gènere separat, Neotamias . Els mateixos estudis també han suggerit que l'esquirol llistat de Palmer en realitat pot ser una subespècie d'esquirol llistat de Uinta, tot i que els dos estan sent generalment considerats com a espècies separades.
Das Uinta-Streifenhörnchen (Tamias umbrinus, Syn.: Neotamias umbrinus) ist eine Hörnchenart aus der Gattung der Streifenhörnchen (Tamias). Es kommt in mehreren amerikanischen Bundesstaaten von Kalifornien bis Wyoming und Colorado vor.
Das Uinta-Streifenhörnchen erreicht eine durchschnittliche Kopf-Rumpf-Länge von etwa 12,0 bis 12,5 Zentimetern, die Schwanzlänge beträgt etwa 8,9 bis 11,9 Zentimeter und das Gewicht etwa 51 bis 74 Gramm. Die Rückenfarbe ist Braun und wie bei anderen Arten der Gattung befinden sich auf dem Rücken mehrere dunkle Rückenstreifen, die durch weiße Streifen getrennt und gegenüber den Körperseiten abgegrenzt sind. Im Gesicht befinden sich ebenfalls zwei weiße Streifen, dazwischen zieht sich ein brauner bis zimtbrauner Streifen über das Auge. Die Körperseiten sind zimtbraun bis gelblich-orange oder hellbraun. Die Kopfoberseite ist gräulich und hinter den Ohren befindet sich im Nacken ein weißer bis cremeweißer Postaurikularfleck. Die Bauchseite ist weiß bis cremeweiß. Der Schwanz ist an der Unterseite orange- bis rotbraun und oberseits gräulich.[1]
Das Uinta-Streifenhörnchen kommt in den Vereinigten Staaten vom östlich-zentralen Kalifornien über Teile von Nevada und den extremen Südwesten von Montana bis in das nordwestliche und südöstliche Wyoming, das östliche Idaho und das nördliche Colorado sowie den äußersten Norden von Arizona vor.[1][2]
Uinta-Streifenhörnchen leben vor allem in Nadelwald-Gebieten, d. h. in Kiefern-, Fichten- und Tannen-Mischwäldern. In Regionen, in denen auch andere Streifenhörnchen vorkommen, leben die Uinta-Hörnchen in den höheren Berglagen.[1]
Das Uinta-Streifenhörnchen ist tagaktiv und besonders in der Tagesmitte zu beobachten. Es lebt sowohl am Boden wie auch häufig kletternd in den Bäumen. Die Tiere ernähren sich vorwiegend herbivor von den Nadelbaumsamen, die sie in den Backentaschen sammeln. Hinzu kommen andere Pflanzenteile, Pilze, Insekten, Vogeleier und kleine Wirbeltiere. Die Tiere legen Vorratslager für den Winter an.[1] Sie überwintern meistens nicht und können das gesamte Jahr aktiv sein, einzelne Individuen bleiben bei schlechtem Wetter allerdings im Nest und können auch eine kurze Winterruhe machen. Die Nester bauen die Tiere unterirdisch zwischen und unter Steinen, in Baumhöhlen, sowie in älteren Nestern anderer Tiere im Geäst der Bäume.[1] Die Tiere sind territorial und sie verteidigen ihre Territorien aggressiv gegen Artgenossen und andere Streifenhörnchen. Die Kommunikation erfolgt vorwiegend zur Abgrenzung der Territorien und als hochfrequente Alarmrufe.[1]
Die Paarungszeit liegt bei dieser Art im Frühjahr.[1] Im größten Teil des Verbreitungsgebietes kommt die Art sympatrisch mit anderen Streifenhörnchen vor. Die Überlebensrate der Tiere ist im Winter teilweise sehr gering und es kommt lokal auch zum temporären Aussterben von Populationen. Aufgrund der Größe der Tiere kommen als Prädatoren verschiedene Greifvögel, Marder, Katzen und Hunde in Frage, bei Bedrohung verstecken sich die Uinta-Streifenhörnchen in der Vegetation.[1]
Das Uinta-Streifenhörnchen wird als eigenständige Art innerhalb der Gattung der Streifenhörnchen (Tamias) eingeordnet, die aus 25 Arten besteht.[3] Die wissenschaftliche Erstbeschreibung stammt von dem amerikanischen Zoologen Joel Asaph Allen aus dem Jahr 1890, der es anhand von Individuen aus den Uinta Mountains im Summit County in Utah beschrieb.[4][5][3] Innerhalb der Streifenhörnchen wird das Uinta-Streifenhörnchen gemeinsam mit den meisten anderen Arten der Untergattung Neotamias zugeordnet, die auch als eigenständige Gattung diskutiert wird.[6]
Innerhalb der Art werden gemeinsam mit der Nominatform sieben Unterarten unterschieden:[1][5]
Häufig wird das isoliert in den Spring Mountains in Nevada lebende Palmer-Streifenhörnchen (Tamias palmeri) als Unterart des Uinta-Streifenhörnchens eingeordnet, in der Regel wird es jedoch als eigene Art betrachtet.[1]
Das Uinta-Streifenhörnchen wird von der International Union for Conservation of Nature and Natural Resources (IUCN) als „nicht gefährdet“ (Least Concern, LC) eingestuft. Begründet wird dies durch das relativ große, jedoch fragmentierte Verbreitungsgebiet und das regelmäßige Vorkommen, bestandsgefährdende Risiken sind nicht bekannt.[2] Die Unterart Tamias umbrinus nevadensis wurde zuletzt 1960 im Hidden Forest in den Sheep Mountains in Nevada gesichtet und trotz vier intensiver Suchen nicht mehr wiederentdeckt.[7]
Das Uinta-Streifenhörnchen (Tamias umbrinus, Syn.: Neotamias umbrinus) ist eine Hörnchenart aus der Gattung der Streifenhörnchen (Tamias). Es kommt in mehreren amerikanischen Bundesstaaten von Kalifornien bis Wyoming und Colorado vor.
The Uinta chipmunk[1] or hidden forest chipmunk[2] (Neotamias umbrinus), is a species of chipmunk in the family Sciuridae. It is endemic to the United States. Formerly known as Tamias umbrinus,[1] phylogenetic studies have shown it to be sufficiently distinct from the eastern chipmunk as to be placed in a separate genus, Neotamias.[3] The same studies have also suggested that Palmer's chipmunk may actually be a subspecies of Uinta chipmunk, although the two are still generally regarded as separate species.[4]
The Uinta chipmunk is a medium-sized chipmunk, with adults ranging from 20 to 24 cm (7.9 to 9.4 in) in length, including the tail at 7 to 11 cm (2.8 to 4.3 in), and weighing an average of 67 g (2.4 oz). The predominant color of the summer coat varies from yellowish brown-grey to dark brown, often with a reddish tinge. Three wide, distinct dark blackish-brown stripes run down the back, separated and surrounded by four paler stripes of pale grey to white fur. Also, three dark and three pale stripes are on each side of the face. In the winter, the coat becomes duller and more greyish, and the stripes become less distinct. The ears are black, and the underparts a very pale grey. The tail has orange and black fur, with a paler fringe of hair on the underside.[5]
The Uinta chipmunk lives in montane and subalpine forests of the western United States, between 1,400 and 3,650 m (4,590 and 11,980 ft) elevation. It is most common at the margins of pine and fir forests, or in clearings, often near rocky terrain or steep slopes.[5][6] Uinta chipmunks do not have a continuous, unbroken range, but are instead found in a number of disjunct localities,[2] perhaps reflecting changing patterns of forest cover during the Pleistocene. Seven subspecies are currently recognized:
Uinta chipmunks are herbivorous. Their primary diet consists of the seeds of coniferous trees such as Douglas fir, ponderosa pine, juniper, and spruce, and on the fruit of local shrubs such as wild roses, raspberries, and chokecherries. They also eat some grass and fungi, and may supplement their diet with small quantities of insects or carrion.[5]
The chipmunks are solitary, diurnal, animals, and are aggressive to other members of their own species, each individual defending a territory of 2 to 5 ha (4.9 to 12.4 acres).[7] They establish dens in burrows under rocks, shrubs, or other shelter, or else in natural rock crevices or hollow logs. They spend much of the winter in their dens, but are otherwise highly arboreal, climbing trees to search for food and escape from predators.[5]
The animals have been reported to make a number of different vocalizations, with most common being bursts of sharp "chip" sounds that can continue for up to 15 minutes, and are made from exposed locations, such as rock outcrops or high branches. Other vocalizations include lower-pitched "chuck" sounds, often interspersed with "chips" while fleeing from predators, trills, and squeals.[8]
The breeding season occurs in the spring, roughly from late April to early June, with the exact time depending on the local climate and latitude. The mother gives birth to a single litter of three to five young after a gestation period around 30 days. The young are weaned around 25 days of age, and begin to leave the burrow shortly thereafter.[5] Only 27.5% of Uinta chipmunks survive through the winter, and the maximum life expectancy is believed to be two years.[8]
The Uinta chipmunk or hidden forest chipmunk (Neotamias umbrinus), is a species of chipmunk in the family Sciuridae. It is endemic to the United States. Formerly known as Tamias umbrinus, phylogenetic studies have shown it to be sufficiently distinct from the eastern chipmunk as to be placed in a separate genus, Neotamias. The same studies have also suggested that Palmer's chipmunk may actually be a subspecies of Uinta chipmunk, although the two are still generally regarded as separate species.
Neotamias umbrinus es una especie de roedor de la familia Sciuridae, endémica de los Estados Unidos.
Prefiere vivir en zonas subalpinas, bosques y come semillas y frutas. Viven en los árboles dispersos, arbustos y rocas.
Datos: Q1767146
Multimedia:
Especies: Tamias umbrinus
Neotamias umbrinus es una especie de roedor de la familia Sciuridae, endémica de los Estados Unidos.
Tamias umbrinus Tamias generoko animalia da. Karraskarien barruko Xerinae azpifamilia eta Sciuridae familian sailkatuta dago.
Tamias umbrinus tai Neotamias umbrinus on maaoravien sukuun kuuluva jyrsijä, joka on kotoperäinen Yhdysvalloissa.[1]
Tamias umbrinus tai Neotamias umbrinus on maaoravien sukuun kuuluva jyrsijä, joka on kotoperäinen Yhdysvalloissa.
De uintachipmunk (Tamias umbrinus) is een zoogdier uit de familie van de eekhoorns (Sciuridae). De wetenschappelijke naam van de soort werd voor het eerst geldig gepubliceerd door J.A. Allen in 1890.
De soort komt voor in de Verenigde Staten.
Bronnen, noten en/of referentiesDe uintachipmunk (Tamias umbrinus) is een zoogdier uit de familie van de eekhoorns (Sciuridae). De wetenschappelijke naam van de soort werd voor het eerst geldig gepubliceerd door J.A. Allen in 1890.
Tamias umbrinus[2][3][4][5][6] är en däggdjursart som beskrevs av J. A. Allen 1890. Den ingår i släktet jordekorrar och familjen ekorrar.[7][8]
Som hos alla jordekorrar har pälsen har en gråbrun grundfärg. De fem mörka ryggstrimmorna är emellertid bruna, inte svarta som hos de flesta andra arter i släktet. De omges av smalare, vita strimmor. Inte heller mittstrimman är helt svart, utan snarare mörkbrun. Buksidan är vitaktig. Liksom andra jordekorrar har arten kraftiga kindpåsar, som den kan lagra mat i. Kroppslängden ligger mellan 21 och 24 cm, och vikten mellan 51 och 74 g. Hanen är något mindre än honan.[9]
Tamias umbrinus lever i barrskog (främst granar, Douglasgran, contortatall och tallar) på höjder mellan 2 000 och 3 400 m. Arten lever framför allt i håligheter i träden, men kan även gräva ut gömslen bakom klippor och buskar. Den uppehåller sig gärna nära nedfallna trädstammar, timmer och buskage.[10]
Födan består främst av frukt, frön från barrträd, lönn och virginiahägg samt enbär. Uppgrävd svamp utgör även en betydelsefull del av dieten. Undantagsvis kan arten ta skott, pollen, insektslarver och fågelägg.[10] As kan även förekomma som föda.[1] Under hösten lagrar den frön och bär i gömslen.[1] Till skillnad från övriga jordekorrar nöjer den sig inte med sparade förråd under vintersömnen, utan äter sig även feta under hösten.[9]
Tamias umbrinus utgör själv byte för många rovdjur, som vesslor, prärievarg, rödräv, ökenkatträv, gråräv, rödlo och hökartade rovfåglar.[10]
Arten sover vintersömn i snötäckta områden, men vinterdvalan är inte särskilt djup; varma dagar kan den lämna gömslet. Det förekommer också att den vaknar till och äter av lagrad föda utan att lämna gömslet, innan den somnar igen.[1]
Som andra jordekorrar parar den sig under våren, och får en kull om 4 till 5 outvecklade ungar efter ungefär en månad. Ungarna blir självständiga i mitten av juli till augusti.[1]
Arten förekommer i västra USA från östra Kalifornien och norra Arizona till norra Colorado, sydöstra och nordvästra Wyoming samt sydvästligaste Montana.[1]
Inga underarter finns listade i Catalogue of Life.[7] Wilson & Reeder däremot, skiljer mellan 7 underarter[4]:
Vissa forskare anser, baserat på analys av mitokondrie-DNA, att arten bör placeras i ett eget släkte, Neotamias.[11][10]
IUCN kategoriserar Tamias umbrinus globalt som livskraftig. Man konstaterar dock att artens utbredningsområde är mycket fragmenterat.[1] Underarten Tamias u. nevadensis betraktas emellertid som akut hotad (CR)[4].
Tamias umbrinus i Capitol Reef nationalpark (Utah), 1993.
Wikimedia Commons har media som rör Tamias umbrinus.
Wikispecies har information om Tamias umbrinus.
Tamias umbrinus är en däggdjursart som beskrevs av J. A. Allen 1890. Den ingår i släktet jordekorrar och familjen ekorrar.
Neotamias umbrinus là một loài động vật có vú trong họ Sóc, bộ Gặm nhấm. Loài này được J. A. Allen mô tả năm 1890.[2]
Neotamias umbrinus là một loài động vật có vú trong họ Sóc, bộ Gặm nhấm. Loài này được J. A. Allen mô tả năm 1890.
유인타다람쥐(Neotamias umbrinus)는 다람쥐과에 속하는 설치류의 일종이다.[2] 미국의 토착종이다. 계통발생학 연구에 의해 유인타다람쥐는 동부다람쥐와 아주 다른 별도의 네오타미아스속으로 분류된다. 같은 연구에서 또한 팔머다람쥐는 실제로 유니타다람쥐의 아종일 수 있다고 주장하지만 두 종은 아직 일반적으로 별도의 종으로 간주되고 있다.[2]
유인타다람쥐는 중형 다람쥐로 꼬리 길이 7~11cm를 포함하여 성체의 전체 몸길이가 20~24cm 정도이고, 몸무게는 평균 67g이다. 여름에는 몸 색깔이 누르스름한 갈색과 회색부터 짙은 갈색까지 다양하고 불그스레한 색조를 띠기도 한다. 3줄의 넓고 뚜렷하며 짙은 거무스레한 갈색 줄무늬가 등부터 아래로 이어지며, 연한 회색부터 흰색까지 연한 색을 띠는 4개의 줄무늬로 둘러싸여 구별된다. 얼굴 옆면에도 3줄의 짙고 연한 줄무늬가 나 있다. 겨울에는 털 색이 좀더 흐릿하고 회색을 띠며, 줄무늬는 덜 뚜렷하다. 귀는 검은색을 띠고, 배 쪽은 아주 연한 회색이다. 꼬리는 오렌지색과 검은 털로 덮여 있으며, 꼬리 아랫면의 털 가장자리는 연한 색을 띤다.[3]
유인타다람쥐는 미국 서부 해발 1400~3650m의 저산대 숲과 아고산 숲에서 서식한다. 소나무와 전나무 숲 또는 개간지 가장자리에서 가장 흔하게 발견되며 암반 지대 또는 가파른 경사면에서도 발견된다.[3][4] 유인타다람쥐는 연속적이고 깨지지 않는 분포 범위를 가지고 있지 않지만, 대신에 여러 국소적인 지역에서 발견되고 이는 홍적세 동안에 숲이 변화하는 패턴이 반영된 것으로 추정된다.[1]
7종의 아종이 알려져 있다.[2]
