dcsimg

Behavior

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Lodgepole chipmunks use a small repertoire of vocalizations to communicate. These include a high “whisk”, a shrill “tsew”, a rapid “pst-pst-pst-a-ku”, a chip, a chippering, a chuck, and a whistle. In courtship, T. speciosus uses a chattering vocalization and visual cues. Tail flipping and various body postures are used during courtship, inter- and intra-specific aggression, and during encounters with potential predators.

Although not specifically reported, we may assume that tactile communication occurs during mating, as well as between mothers and their young.

Communication Channels: visual ; tactile ; acoustic

Perception Channels: visual ; tactile ; acoustic ; chemical

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bibliographic citation
Quesada, V. and A. Chambers 2006. "Tamias speciosus" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Tamias_speciosus.html
editor
Nancy Shefferly, Animal Diversity Web
author
Vivian Quesada, California State Polytechnic University, Pomona
author
Amy Chambers, California State Polytechnic University, Pomona
editor
John Demboski, California State Polytechnic University, Pomona
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Conservation Status

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According to most sources, T. speciosus has no special conservation status. IUCN lists this species as a lower risk animal. In spite of this, it is important to maintain their habitat to assure that the species is maintained in the future.

US Federal List: no special status

CITES: no special status

IUCN Red List of Threatened Species: least concern

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The Regents of the University of Michigan and its licensors
bibliographic citation
Quesada, V. and A. Chambers 2006. "Tamias speciosus" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Tamias_speciosus.html
editor
Nancy Shefferly, Animal Diversity Web
author
Vivian Quesada, California State Polytechnic University, Pomona
author
Amy Chambers, California State Polytechnic University, Pomona
editor
John Demboski, California State Polytechnic University, Pomona
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Benefits

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Tamias speciosus is known to be a host for Yersinia pestis (plague) and for various ectoparasites, such as fleas, ticks, and lice. Besides plague, these parasitic organisms can harbor potentially dangerous diseases such as rabies. There is a direct economic cost when humans must be treated for these diseases.

Negative Impacts: injures humans (bites or stings, causes disease in humans , carries human disease)

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bibliographic citation
Quesada, V. and A. Chambers 2006. "Tamias speciosus" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Tamias_speciosus.html
editor
Nancy Shefferly, Animal Diversity Web
author
Vivian Quesada, California State Polytechnic University, Pomona
author
Amy Chambers, California State Polytechnic University, Pomona
editor
John Demboski, California State Polytechnic University, Pomona
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Benefits

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Humans profit from the lodgepole chipmunks through their effects on their ecosystem. Tamias speciosus keeps down pests that could harm plants and other organisms. They have a mutualism with ecotomycorrhizal fungi and with many plant species for which they disperse seeds. Tamias speciosus also provides enjoyment for humans who view them in nature. There may be some economic value in breeding these animals for the pet trade.

Positive Impacts: pet trade ; food ; research and education; controls pest population

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The Regents of the University of Michigan and its licensors
bibliographic citation
Quesada, V. and A. Chambers 2006. "Tamias speciosus" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Tamias_speciosus.html
editor
Nancy Shefferly, Animal Diversity Web
author
Vivian Quesada, California State Polytechnic University, Pomona
author
Amy Chambers, California State Polytechnic University, Pomona
editor
John Demboski, California State Polytechnic University, Pomona
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Associations

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Tamias speciosus consumes truffles of ectomycorrhizal fungi. These fungi aid forest ecosystems by increasing their water and nutrient uptake and by facilitating forest succession. Tamias speciosus plays a major role in the health and succession of forest ecosystems by dispersing viable fungal spores to new patches as well as being important seed and pollen dispersers.

Tamias speciosus is also an important part of food webs, in which it serves as both predator and prey.

Ecosystem Impact: disperses seeds

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The Regents of the University of Michigan and its licensors
bibliographic citation
Quesada, V. and A. Chambers 2006. "Tamias speciosus" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Tamias_speciosus.html
editor
Nancy Shefferly, Animal Diversity Web
author
Vivian Quesada, California State Polytechnic University, Pomona
author
Amy Chambers, California State Polytechnic University, Pomona
editor
John Demboski, California State Polytechnic University, Pomona
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Trophic Strategy

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Lodgepole chipmunks are omnivorous, eating a wide range of seeds, nuts, berries and insects. They also eat other arthropods, fungi, and small vertebrates. Tamias speciosus individuals consume leaves, flowers, pollen, fruit, and garbage, when such items are available. They are known to be great robbers of eggs from bird nests, and they cache food.

Animal Foods: birds; mammals; eggs; insects; terrestrial non-insect arthropods

Plant Foods: leaves; seeds, grains, and nuts; fruit; pollen; flowers

Other Foods: fungus

Foraging Behavior: stores or caches food

Primary Diet: omnivore

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The Regents of the University of Michigan and its licensors
bibliographic citation
Quesada, V. and A. Chambers 2006. "Tamias speciosus" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Tamias_speciosus.html
editor
Nancy Shefferly, Animal Diversity Web
author
Vivian Quesada, California State Polytechnic University, Pomona
author
Amy Chambers, California State Polytechnic University, Pomona
editor
John Demboski, California State Polytechnic University, Pomona
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Distribution

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The range of Tamias speciosus is contained primarily within California. Populations occupy the eastern side of the Sierra Nevada, and in southern California, the disjunct San Bernardino, San Jacinto, and San Gabriel mountains. Lodgepole chipmunks extend as far north as Toulume and Nevada Counties, with unconfirmed presence further north. The species in also found in the Lake Tahoe region of California and Nevada.

Biogeographic Regions: nearctic (Native )

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The Regents of the University of Michigan and its licensors
bibliographic citation
Quesada, V. and A. Chambers 2006. "Tamias speciosus" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Tamias_speciosus.html
editor
Nancy Shefferly, Animal Diversity Web
author
Vivian Quesada, California State Polytechnic University, Pomona
author
Amy Chambers, California State Polytechnic University, Pomona
editor
John Demboski, California State Polytechnic University, Pomona
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Habitat

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Lodgepole chipmunks are found in subalpine mixed conifir forests containing lodgepole pine, red fir, and Jeffery pine. Other woodland vegetation includes white fir, Douglas fir, ponderosa pine, sugar pine, incense cedar, and California black oak. Tamias speciosus typically occurs at elevations between 1,500 and 3,300 m, with the greatest density of populations occuring between 2,400 and 3,000 m.

Range elevation: 1500 to 3300 m.

Habitat Regions: temperate ; terrestrial

Terrestrial Biomes: forest ; mountains

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The Regents of the University of Michigan and its licensors
bibliographic citation
Quesada, V. and A. Chambers 2006. "Tamias speciosus" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Tamias_speciosus.html
editor
Nancy Shefferly, Animal Diversity Web
author
Vivian Quesada, California State Polytechnic University, Pomona
author
Amy Chambers, California State Polytechnic University, Pomona
editor
John Demboski, California State Polytechnic University, Pomona
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Life Expectancy

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Not much is known about T. speciosus lifespan. Individuals of this species are usually expected to only live through one breeding season, which is about a year. Mortality may be due to predation or to low temperatures, as many of these chipmunks are thought to freeze to death.

In spite of low average lifespan, individuals may live for up to 4 years in the wild and 5 years in captivity.

Range lifespan
Status: wild:
2 to 4 years.

Range lifespan
Status: captivity:
2 to 5 years.

Typical lifespan
Status: wild:
1 to 2 years.

license
cc-by-nc-sa-3.0
copyright
The Regents of the University of Michigan and its licensors
bibliographic citation
Quesada, V. and A. Chambers 2006. "Tamias speciosus" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Tamias_speciosus.html
editor
Nancy Shefferly, Animal Diversity Web
author
Vivian Quesada, California State Polytechnic University, Pomona
author
Amy Chambers, California State Polytechnic University, Pomona
editor
John Demboski, California State Polytechnic University, Pomona
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Morphology

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Tamias speciosus is a small sciurid, typically weighing between 50 and 70 g. These animals measure from 197 to 212 mm in length. Tail length is reported at 13 to 22 mm. As in other chipmunks, females are slightly larger than males.

Tamias speciosus is a brightly colored, medium-sized chipmunk compared to others of the genus. It is easily distinguished from sympatric and parapatric relatives by its remarkably prominent facial and dorsal stripes. The dark cheek and submolar facial stripes are blacker with some brown and broader than in other neighboring species. The submolar stripes extend from the rostrum to the ear and are central below the eyes. The dark dorsal stripes strongly contrast with the light dorsal stripes. The black median stripe may fade to brown across the shoulder area. The white medial stripes are slightly yellow, whereas the white lateral stripes are much brighter and more prominent. These chipmunks nearly to completely lack a dark outer lateral stripe. The crown of the head is usually brown and sprinkled with grey. The sides of the head can be yellowish-tawny to brown in the summer. There is a white patch behind the ears, and the underside of the tail is cinnamon through most of the length with black near the tip.

The incisors of lodgepole chipmunks are short and straight, helping to distinguish these chipmunks from other species in the area. The dental formula of T. speciosus is 1-0-2-3/1-0-1-3.

In areas of sympatry, the size and shape of genital bones may provide the most diagnostic features of these animals. The baculum is 2.1 to 3.2 mm in length and the distal 2/3 of the shaft is strongly compressed.

Molecular differences with related species may be used in identification, since T. speciosus is sometimes confused with Tamias amoenus based solely on morphological diagnostics.

Chipmunks are endothermic hibernators. Their body temperature changes seasonally, so they can be considered heterothermic. However, since individuals maintain a constant body temperature in any given season, they can also be called homoiothermic.

Range mass: 50.6 to 69.5 g.

Average mass: 59 g.

Range length: 197 to 229 mm.

Average length: 212 mm.

Other Physical Features: endothermic ; heterothermic ; homoiothermic; bilateral symmetry

Sexual Dimorphism: female larger

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The Regents of the University of Michigan and its licensors
bibliographic citation
Quesada, V. and A. Chambers 2006. "Tamias speciosus" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Tamias_speciosus.html
editor
Nancy Shefferly, Animal Diversity Web
author
Vivian Quesada, California State Polytechnic University, Pomona
author
Amy Chambers, California State Polytechnic University, Pomona
editor
John Demboski, California State Polytechnic University, Pomona
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Associations

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Predators of lodgepole chipmunks include coyotes, Cooper's hawks, and red-tailed hawks. Other predators of T. speciosus are grey foxes, other foxes bobcats, and martens.

Known Predators:

  • coyotes (Canis latrans)
  • Cooper's hawks (Accipiter cooperi)
  • red-tailed hawks (Buteo jamaicensis)
  • grey foxes (Urocyon cinereoargenteus)
  • other foxes (Vulpes)
  • bobcats (Lynx rufus)
  • martens (Martes americana)

Anti-predator Adaptations: cryptic

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cc-by-nc-sa-3.0
copyright
The Regents of the University of Michigan and its licensors
bibliographic citation
Quesada, V. and A. Chambers 2006. "Tamias speciosus" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Tamias_speciosus.html
editor
Nancy Shefferly, Animal Diversity Web
author
Vivian Quesada, California State Polytechnic University, Pomona
author
Amy Chambers, California State Polytechnic University, Pomona
editor
John Demboski, California State Polytechnic University, Pomona
original
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Reproduction

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When males are ready to mate, the scrotum is black and the testes are in a pendulous position. Both females and males use chattering vocalization and visual cues to attract mates, such as flipping their tails and using various body postures.

Although data on the mating system of this species are not available, most members of the genus Tamias for which mating systems have been described are polygynous. It is likely that T. speciosus is similar.

Tamias speciosus breeds during May and early June. The gestation period is about one month, after which a litter of 3 to 6 pups is born. Young chipmunks are typically poorly developed at birth. Lactation lasts for 1 month. Young are independent shortly after weaning, and typically disperse in the autumn of their birth year. These chipmunks reach reproductive maturity the following spring.

Breeding interval: These animals breed once per year.

Breeding season: Breeding occurs from May to early June.

Range number of offspring: 3 to 6.

Average gestation period: 30 days.

Range weaning age: 2 to 4 weeks.

Range time to independence: 3 to 4 weeks.

Range age at sexual or reproductive maturity (female): 10 to 12 months.

Range age at sexual or reproductive maturity (male): 10 to 12 months.

Key Reproductive Features: iteroparous ; seasonal breeding ; gonochoric/gonochoristic/dioecious (sexes separate); sexual ; fertilization ; viviparous

Young are born in spring or early summer. Mothers lactate for about a month, at which time they stop caring for their young. Males are not known to provide any parental care in this species.

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)

license
cc-by-nc-sa-3.0
copyright
The Regents of the University of Michigan and its licensors
bibliographic citation
Quesada, V. and A. Chambers 2006. "Tamias speciosus" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Tamias_speciosus.html
editor
Nancy Shefferly, Animal Diversity Web
author
Vivian Quesada, California State Polytechnic University, Pomona
author
Amy Chambers, California State Polytechnic University, Pomona
editor
John Demboski, California State Polytechnic University, Pomona
original
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Animal Diversity Web