Chilomys instans


Taxonomy [top]

Kingdom Phylum Class Order Family

Scientific Name: Chilomys instans
Species Authority: (Thomas, 1895)
Common Name(s):
English Colombian Forest Mouse
Taxonomic Notes: This is a species complex containing at least three species (V. Pacheco pers. comm.).

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2008
Date Assessed: 2008-06-30
Assessor(s): Aguilera, M., Gómez-Laverde, M., Tirira, D., Pacheco, V. & Rivas, B.
Reviewer(s): Amori, G. (Small Nonvolant Mammal Red List Authority) & Schipper, J. (Global Mammal Assessment Team)
This species is listed as Least Concern in view of its wide distribution, presumed large population, it occurs in a number of protected areas, and because it is unlikely to be declining at nearly the rate required to qualify for listing in a threatened category.

Geographic Range [top]

Range Description: This species occurs in the north Andes, from central Ecuador (Musser et al., 1998), through central and north Colombia, to west Venezuela (Handley, 1976; Linares, 1998; Musser and Carleton, 2005). It has an altitudinal range of 1,100 to 3,700 m.
Colombia; Ecuador; Venezuela, Bolivarian Republic of
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: In Ecuador this rodent is uncommon (Tirira, in prep.). In Venezuela it is rare (Linares, 1998).
Population Trend: Stable

Habitat and Ecology [top]

Habitat and Ecology: This rodent is poorly known. It is restricted to moist humid cloud forest and co-occurs with the larger Thomasomys hylophilus, which it resembles (Aagaard, 1982). It is terrestrial, omnivorous, and nocturnal.
Systems: Terrestrial

Threats [top]

Major Threat(s): No major threats although deforestation is affecting the species in some parts of its range.

Conservation Actions [top]

Conservation Actions: This species occurs in a number of protected areas throughout its range. Further research is needed to determinate its taxonomic status.

Citation: Aguilera, M., Gómez-Laverde, M., Tirira, D., Pacheco, V. & Rivas, B. 2008. Chilomys instans. The IUCN Red List of Threatened Species. Version 2015.2. <>. Downloaded on 01 September 2015.
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