Overview

Distribution

Range Description

This species occurs in south-east Coahuila through central Nuevo Leon, and south through west Tamaulipas to extreme north San Luis Potosi, Mexico (Hoffmann and Thorington 2005). It occurs from 600 to 2,550 m.
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Physical Description

Type Information

Type for Sciurus alleni Nelson, 1898
Catalog Number: USNM 25731
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Mammals
Sex/Stage: Male; Adult
Preparation: Skin; Skull
Collector(s): C. Streator
Year Collected: 1891
Locality: Monterrey, Nuevo Leon, Mexico, North America
  • Type: Nelson, E. W. 1898 Jun 03. Proceedings of the Biological Society of Washington. 12: 147.
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Source: National Museum of Natural History Collections

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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
This species is found primarily in oak and oak-pine forests (Best 1995).

In some localities it was observed during the early morning hours. Nests may be inside natural cavities of trees or built of leaves and sticks placed on branches of trees. Larvae and adult insects are common in the diet; peanuts, corn, oats, apples, peaches, mangos, plums, grapes, tomatoes, and anurans also are consumed. This species occasionally enters cornfields and can considerably damage ripening corn. Several females were recorded with embryos (2 to 4) in March, July, and August; two females on April were lactating; and a nest containing several small young was found in August in a hollow branch of a tree (Best 1995).

Systems
  • Terrestrial
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2008

Assessor/s
de Grammont, P.C. & Cuarón, A.

Reviewer/s
McKnight, M. (Global Mammal Assessment Team) & Amori, G. (Small Nonvolant Mammal Red List Authority)

Contributor/s

Justification
Listed as Least Concern in view of its wide distribution, presumed large population, occurrence in protected areas, and because it is unlikely to be declining at nearly the rate required to qualify for listing in a threatened category.

History
  • 1996
    Lower Risk/least concern
    (Baillie and Groombridge 1996)
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Population

Population
It can be uncommon in some parts of its range, however, in other places it may be common (Best 1995).

Population Trend
Decreasing
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Threats

Major Threats
This species is threatened by deforestation and hunting (for food). It is estimated to have lost 13-23% of its population based upon habitat change over the past 15 years (C. de Granmont and A. Cuaron pers. comm.).
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Management

Conservation Actions

Conservation Actions
There are no specific conservation measures in place for this species. The species is common in Cumbres de Monterey National Park.
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Wikipedia

Allen's squirrel

Allen's squirrel (Sciurus alleni) is a tree squirrel in the genus Sciurus endemic to northern Mexico. It has no subspecies.[2]

References[edit]

  1. ^ de Grammont, P. C. & Cuarón, A. (2008). Sciurus alleni. In: IUCN 2008. IUCN Red List of Threatened Species. Retrieved 6 January 2009.
  2. ^ a b Thorington, R.W., Jr.; Hoffmann, R.S. (2005). "Sciurus (Sciurus) alleni". In Wilson, D.E.; Reeder, D.M. Mammal Species of the World: a taxonomic and geographic reference (3rd ed.). The Johns Hopkins University Press. pp. 754–818. ISBN 0-8018-8221-4. OCLC 26158608. 
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