Caatinga vesper mouse Calomys expulsus Least concern
Where the caatinga vesper mouse lives – recorded in 1 country, with quick facts from Wikidata and an introduction from Wikipedia.
Pin and shaded countries are approximate. The pin is a representative wild sighting (a central record among 71 open-licence GBIF records), not an official range. Method · Records on GBIF · See mice, rats & other rodents on the world map

| Scientific name | Calomys expulsus |
|---|---|
| Group | Mice, rats & other rodents |
| Status | Least concern (Wikidata, IUCN category label) |
| Found in | 1 country |
| Continents | South America |
| Class | Mammal |
| Order | Rodentia |
| Family | Cricetidae |
Where does the caatinga vesper mouse live?
Open-licence (CC0 / CC BY) wild records published on GBIF place the caatinga vesper mouse in 1 country or territory across South America. Wikidata gives its range as: Brazil.
Countries with at least a handful of records (a minimum share of the species’ records, to leave out vagrants and escapes). Records with coordinates only; captive and fossil records excluded.
Is the caatinga vesper mouse endangered?
The caatinga vesper mouse’s conservation status recorded in Wikidata is “Least concern” (an IUCN Red List category label). Source: Wikidata.
What kind of animal is the caatinga vesper mouse?
The caatinga vesper mouse (Calomys expulsus) is a mammal in the order Rodentia and the family Cricetidae, genus Calomys. (Taxonomy from Wikidata.)
About the caatinga vesper mouse
The caatinga vesper mouse (Calomys expulsus) (also known as the caatinga laucha or rejected vesper mouse) is a rodent species in the family Cricetidae from South America. It is endemic to eastern Brazil, where it is found in open savanna (cerrado) and thorny scrub (caatinga) habitats. Its karyotype has 2n = 66 and FN = 68. It was formerly synonymized with C. callosus, but the latter has 2n = 50 and FN = 66. Karyologic analysis of C. expulsus has shown that the X chromosome is large and submetacentric while the Y chromosome is either acrocentric or submetacentric. Predators include the barn owl . Sexual dimorphism in shape and size occurs; the former is present mainly before the age of 20 days. Males are smaller before age 50 days and larger thereafter, which becomes less prominent after 200 days.
Text in “About” is quoted from the Wikipedia article Caatinga vesper mouse (revision 1353363318), licensed under CC BY-SA 4.0. Changes: lead section excerpted verbatim, formatting removed. Quick facts, taxonomy and status: Wikidata Q1768782 (CC0). Countries and pin: GBIF.org occurrence records (CC0 / CC BY 4.0).
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