Nyctomys sumichrasti 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Mammalia Rodentia Cricetidae

Scientific Name: Nyctomys sumichrasti (Saussure, 1860)
Common Name(s):
English Vesper Rat
Taxonomic Notes: Will be transferred to family Cricetidae.

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2016
Date Assessed: 2016-09-06
Assessor(s): Samudio, R., Pino, J. & Reid, F.
Reviewer(s): Amori, G.
This species is listed as Least Concern in view of its wide distribution, presumed large population, tolerance of a degree of habitat modification, occurrence in protected areas, and because it does not appear to be under threat and is unlikely to be declining at nearly the rate required to qualify for listing in a threatened category.
Previously published Red List assessments:

Geographic Range [top]

Range Description:This species occurs in lowland and lower montane forests from south Jalisco and south Veracruz, Mexico, south to central Panama, excluding the Yucatán Peninsula (Musser and Carleton 2005). It occurs from lowlands to 1,800 m (Reid 1997).
Countries occurrence:
Belize; Costa Rica; El Salvador; Guatemala; Honduras; Mexico; Nicaragua; Panama
Additional data:
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:This species is generally common.
Current Population Trend:Stable
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:It is found in evergreen and semideciduous forest and tall second growth (Reid 1997).

This mouse is nocturnal and strictly arboreal. Its short limbs and broad body give it a waddling gait on the ground, but may aid in balance on vertical vines and branches, where it appears to be more agile. The diet includes figs, fruit of madders and borage (Cordia diversifolia), seeds, and insects. Several individuals were seen catching small white moths among the rafters of a house in Costa Rica. Nests were found in tree hollows in Veracruz (Hall and Dalquest 1963, in Reid 1997). Entrances of 3 to 8 cm diameter were preferred, leading to larger hollows 15 to 32 cm wide (Reid 1997). This species is usually silent in the wild (Reid 1997). Litter size is 1 to 4 young, averaging 2, and reproduction may take place year-round (Reid 1997).
Generation Length (years):1-2

Threats [top]

Major Threat(s): None known.

Conservation Actions [top]

Conservation Actions: Occurs in protected areas. More research needed into its population dynamics.

Errata [top]

Errata reason: This errata assessment has been created because the map was accidentally left out of the version published previously.

Citation: Samudio, R., Pino, J. & Reid, F. 2016. Nyctomys sumichrasti. (errata version published in 2017) The IUCN Red List of Threatened Species 2016: e.T14999A115124642. . Downloaded on 24 September 2017.
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