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Sciurus colliaei

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA CHORDATA MAMMALIA RODENTIA SCIURIDAE

Scientific Name: Sciurus colliaei
Species Authority: Richardson, 1839
Common Name/s:
English Collie's Squirrel

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2008
Date Assessed: 2008-06-30
Assessor/s: de Grammont, P.C., Cuarón, A. & Vázquez, E.
Reviewer/s: McKnight, M. (Global Mammal Assessment Team) & Amori, G. (Small Nonvolant Mammal Red List Authority)
Justification:
This species is listed as Least Concern in view of its wide distribution, presumed large population, 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)

Geographic Range [top]

Range Description: This species occurs in the west central coast of Mexico, including Sonora, Chihuahua, Sinaloa, Durango, Nayarit, Jalisco, and Colima (Thorington and Hoffmann 2005). The elevational range is from sea level to 1,290 m to 2,190 m (Best 1995).
Countries:
Native:
Mexico
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: This species is widespread but with low densities. It is common in suitable habitat (Best 1995). In the Chamela-Cuixmala Biosphere reserve, this species is more abundant in semi-evergreen than tropical dry forest and their density varies from 0.9 - 4.3 individuals per km2 (Mandujano 1997).
Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: This species can be found in thick forests along the Pacific coast in tropical or subtropical forests. It can occur in coquito palm (Arecaceae) forests intermixed with figs (Ficus) and other native tropical broadleaf trees surrounding lagoons and rivers, and also in tropical deciduous forest on slopes below the oak-pine forest (Best 1995).

It is frugivore and herbivore, feeding on nuts of coquito palms and figs. Nests of twigs and leaves may be in hollow trees or on the bushy terminal parts of tree limbs. In Southwestern Chihuahua, a female with three embryos were found in May; in Durango, in June, a female was pregnant with three embryos, and another was lactating; in Jalisco, breeding occurs in March and April, and young are present in April (Best 1995).
Systems: Terrestrial

Threats [top]

Major Threat(s): Although not presently considered under major threats, this species habitat is affected by deforestation and it is hunted for food. It is estimated to have lost 6-8% of its population based upon habitat change over the past 15 years (C. de Granmont and A. Cuaron pers. comm.).

Conservation Actions [top]

Conservation Actions: There are no specific conservation measures for this species. There are protected areas within its range.

Bibliography [top]

Best, T. L. 1995. Sciurus colliaei. Mammalian Species 497: 1-3.

Hoffmann, R. S. and Thorington, R. J. 2005. Family Sciuridae. In: E. Wilson and D. M. Reeder (eds), Mammal Species of the World, pp. 754-818. John Hopkins University Press, Baltimore, Maryland, USA.

Mandujano, S. 1997. Densidad poblacional de la ardilla gris del pacífico (Sciurus colliaei) en un bosque tropical caducifolio de Jalisco. Revista Mexicana de Mastozoología 2: 90-96.

Citation: de Grammont, P.C., Cuarón, A. & Vázquez, E. 2008. Sciurus colliaei. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <www.iucnredlist.org>. Downloaded on 23 April 2014.
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