Big brown bat

Weight

16.5 g – 17.2 g

Length

Not recorded

Lifespan

19 years – 20 years

Diet

Invertivore

Main food

Not recorded

Habitat

Not recorded

Gestation

43.6 days

Young per litter or clutch

1.93

Age at maturity

15.5 months – 2 years

Litters or clutches a year

1

Active

At night (nocturnal)

Lifestyle

Aerial

Conservation status

Not recorded

Countries on record

Not recorded

Not recorded

No conservation assessment is recorded for this species in our sources. That is not the same as being safe: it has not been matched to an assessment.

1. kingdomAnimalia
2. phylumChordata
3. classMammalia
4. orderChiroptera
5. familyVespertilionidae
6. genusEptesicus
7. SpeciesEptesicus fuscus (Palisot de Beauvois, 1796)

Catalogue of Life

LC, Least Concern

Serotine bat

Eptesicus serotinus

Vespertilionidae

LC, Least Concern

Northern bat

Eptesicus nilssonii

Vespertilionidae

B

Botta's serotine

Eptesicus bottae

VespertilionidaeNo free photo yet

G

Gobi serotine

Eptesicus gobiensis

VespertilionidaeNo free photo yet

A

Argentine serotine

Eptesicus furinalis

VespertilionidaeNo free photo yet

B

Brazilian serotine

Eptesicus brasiliensis

VespertilionidaeNo free photo yet

CompareBig brown bat vs Serotine batBig brown bat vs Northern batBig brown bat vs Botta's serotineBig brown bat vs Gobi serotine

• An amniote life-history database to perform comparative analyses with birds, mammals, and reptiles · CC0 1.0 · E096-269
  Myhrvold, N.P., Baldridge, E., Chan, B., Sivam, D., Freeman, D.L. & Ernest, S.K.M. (2015) An amniote life-history database to perform comparative analyses with birds, mammals, and reptiles. Ecology 96: 3109. https://doi.org/10.1890/15-0846R.1. Data: https://doi.org/10.6084/m9.figshare.3563457.v1
• AmphiBIO, a global database for amphibian ecological traits · CC BY 4.0 · v1
  Oliveira, B.F., São-Pedro, V.A., Santos-Barrera, G., Penone, C. & Costa, G.C. (2017) AmphiBIO, a global database for amphibian ecological traits. Scientific Data 4: 170123. https://doi.org/10.1038/sdata.2017.123. Data: https://doi.org/10.6084/m9.figshare.4644424.v5
• AVONET: morphological, ecological and geographical data for all birds · CC BY 4.0 · v7
  Tobias, J.A. et al. (2022) AVONET: morphological, ecological and geographical data for all birds. Ecology Letters 25: 581–597. https://doi.org/10.1111/ele.13898. Data: https://doi.org/10.6084/m9.figshare.16586228.v7
• Catalogue of Life eXtended Release · CC BY 4.0 · 2026-10-16 XR
  Catalogue of Life (2026). Catalogue of Life eXtended Release, version 2026-10-16 XR. Catalogue of Life Foundation, Amsterdam, Netherlands. https://doi.org/10.48580/dgzlf
• Wikimedia Commons · per file (CC0 / public domain / CC BY green, CC BY-SA amber, anything else not displayed) · 2026-11-11
  Wikimedia Commons contributors. Wikimedia Commons. https://commons.wikimedia.org (each file credited to its author under its own licence).
• EltonTraits 1.0: species-level foraging attributes of the world's birds and mammals · CC0 1.0 · 1.0
  Wilman, H., Belmaker, J., Simpson, J., de la Rosa, C., Rivadeneira, M.M. & Jetz, W. (2014) EltonTraits 1.0: Species-level foraging attributes of the world's birds and mammals. Ecology 95: 2027. https://doi.org/10.1890/13-1917.1. Data: https://doi.org/10.6084/m9.figshare.3559887.v1
• Wikidata · CC0 1.0 · 2026-11-11
  Wikidata contributors. Wikidata. https://www.wikidata.org (data retrieved via the Wikidata Query Service).
• Wikipedia (English) · CC BY-SA 4.0 · 2026-11-11
  Wikipedia contributors. Wikipedia, The Free Encyclopedia. https://en.wikipedia.org (text under CC BY-SA 4.0; each block names its article and revision).

@misc{big_brown_bat_2026,
  title = {Big brown bat (Eptesicus fuscus)},
  author = {{CreatureData}},
  year = {2026},
  url = {https://creaturedata.com/animals/big-brown-bat},
  note = {Data as of 2026-11-11}
}