Oligoryzomys flavescens 


Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Mammalia Rodentia Cricetidae

Scientific Name: Oligoryzomys flavescens
Species Authority: (Waterhouse, 1837)
Common Name(s):
English Yellow Pygmy Rice Rat

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2008
Date Assessed: 2008-06-30
Assessor(s): Weksler, M., Bonvicino, C., D'Elia, G., Pardinas, U. Teta, P. & Jayat, J.P.
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, occurrence in a number of protected areas, tolerance to some degree of habitat modification, and because it is unlikely to be declining at nearly the rate required to qualify for listing in a threatened category.
Previously published Red List assessments:
1996 Lower Risk/least concern (LR/lc)

Geographic Range [top]

Range Description: This species occurs in eastern Paraguay (Bonvicino and Weksler, 1998), southeastern Brazil (Rio Grande do Sul to Bahia), Uruguay, and northern to south-central Argentina; range limits uncertain (Musser and Carleton 2005).
Countries occurrence:
Argentina; Brazil; Paraguay; Uruguay
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: This species is commons in the southern distribution but less common in the north (Weksler pers. comm.).
Current Population Trend: Stable
Additional data:
Population severely fragmented: No

Habitat and Ecology [top]

Habitat and Ecology: This nocturnal species is found in a variety of habitats usually near to water, in Uruguay it is reported from tall grasses in marshlands and in Argentina in brushy arid areas (Eisenberg and Redford, 1999). This species occurs in scrublands and some hilly regions (Gonzalez 2001). It is adaptable to agricultural areas (at least in Argentina) (Weksler pers. comm.). It seems to be primarily herbivorous but occasionally feeds upon invertebrates. Births from spring to autumn with 3-7 (average 5) young per litter (Gonzalez 2001). Reservoir of several hantavirus (central plata and lechiguaras) (D'Elia, G., comm. Pers.)
Systems: Terrestrial

Threats [top]

Major Threat(s): There are no major threats at this time.

Conservation Actions [top]

Conservation Actions: This species occurs in several protected areas.

Classifications [top]

3. Shrubland -> 3.6. Shrubland - Subtropical/Tropical Moist
suitability: Suitable  
4. Grassland -> 4.4. Grassland - Temperate
suitability: Suitable  
4. Grassland -> 4.5. Grassland - Subtropical/Tropical Dry
suitability: Suitable  
4. Grassland -> 4.6. Grassland - Subtropical/Tropical Seasonally Wet/Flooded
suitability: Suitable  

In-Place Research, Monitoring and Planning
In-Place Land/Water Protection and Management
  Occur in at least one PA:Yes
In-Place Species Management
In-Place Education

Bibliography [top]

Eisenberg, J.F. and Redford, K.H. 1999. Mammals of the Neotropics: The Central Neotropics. The University of Chicago Press, Chicago, USA.

Gonzalez, E.M. 2001. Guia de Campo de los Mamiferos de Uraguay. Introduccion al Estudio de los Mamiferos. Vida Silvestre, Montevideo, Uruguay.

Musser, G. G. and Carleton, M. D. 2005. Superfamily Muroidea. In: D. E. Wilson and D. A. Reeder (eds), Mammal Species of the World: a geographic and taxonomic reference, pp. 894-1531. The John Hopkins University Press, Baltimore, USA.

Citation: Weksler, M., Bonvicino, C., D'Elia, G., Pardinas, U. Teta, P. & Jayat, J.P. 2008. Oligoryzomys flavescens. The IUCN Red List of Threatened Species 2008: e.T15247A4504640. . Downloaded on 04 May 2016.
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