Evidence found
8,420 records across 17 countries and territories, 1860–2026.
Eptesicus fuscus · GBIF taxon key 2432352
Where has the big brown bat been recorded?
Eptesicus fuscus occurrence evidence comes from 8,420 records in 17 countries and territories, from 1860 to 2026. Most records come from United States.
- 8,420 records
- 17 places
- 143 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: July.
9 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: July. 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
18602026
Recording effort has risen steeply almost everywhere since the 1990s, so a rising line usually shows more observers rather than more animals.
Where big brown bat has been recorded
The countries below show where occurrence evidence exists for big brown bat. They do not define a complete habitat range: survey effort differs by place, and historical or one-off records can appear alongside repeated presence.
| Place | Records | Share |
|---|---|---|
| United States | 7,568 | |
| Mexico | 569 | |
| Canada | 98 | |
| Bahamas | 64 | |
| Dominican Republic | 43 | |
| Guatemala | 21 | |
| Costa Rica | 15 | |
| Cuba | 11 | |
| Cayman Islands | 9 | |
| Honduras | 7 | |
| Colombia | 3 | |
| Puerto Rico | 3 | |
| Venezuela | 3 | |
| Panama | 2 | |
| Bermuda | 1 | |
| Jamaica | 1 | |
| El Salvador | 1 |
Related animals
Others in the family Vespertilionidae.
Common Pipistrelle
33,835 records
Noctule Bat
28,476 records
Kuhl's pipistrelle
1,130 records
Banana Bat
1,055 records
Savi's Pipistrelle
421 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.