Evidence found
1,227 records across 4 countries and territories, 1913–2007.
Oligoryzomys microtis · GBIF taxon key 2438283
Where has the Small-eared Colilargo been recorded?
Oligoryzomys microtis occurrence evidence comes from 1,227 records in 4 countries and territories, from 1913 to 2007. Most records come from Bolivia.
- 1,227 records
- 4 places
- 44 years recorded
- Mammalia class
Observation evidence passport
Source coverage
CC0 GBIF Animalia occurrence facets, including country, month and year summaries.
Refreshed 2026-09-22. Inspect the taxon on GBIF.
What this means
The species has been recorded in the listed places in the stated source universe. Peak month: August.
5 months reach at least 10% of the peak facet count.
What this does not mean
repeated describes the record pattern, not a formal range, residency, abundance or conservation assessment.
A single record remains evidence of a recording, not proof that a population lives there.
Compare this animal’s observation pattern
When it is recorded
JFMAMJJASOND
Peak month: August. Records cluster in the months an animal is present and being looked for, so a summer peak can reflect observer effort as much as the animal.
Records over time
19132007
Recording effort has risen steeply almost everywhere since the 1990s, so a rising line usually shows more observers rather than more animals.
Where Small-eared Colilargo has been recorded
The countries below show where occurrence evidence exists for Small-eared Colilargo. They do not define a complete habitat range: survey effort differs by place, and historical or one-off records can appear alongside repeated presence.
Related animals
Others in the family Cricetidae.
muskrat
1,424,799 records
Bank Vole
6,466 records
Gray Dwarf Hamster
806 records
Afghan Mole-Vole
57 records
Record pattern: repeated
Repeated records across many years and months. This is inferred from how many years and months the animal appears in, not from a range map — treat it as evidence, not a formal assessment.
Repeated records across many years and months. This is inferred from how many years and months the animal appears in, not from a range map — treat it as evidence, not a formal assessment.