CreatureData

Big brown bat vs Serotine bat

The serotine bat is heavier: 22.9 g against 16.5 g for the big brown bat, about 39% more.

Big brown bat (Eptesicus fuscus)
Big brown bat LCLeast Concern
Photo: NPS · Public domain · Wikimedia Commons
Serotine bat (Eptesicus serotinus)
Serotine bat LCLeast Concern
Photo: Mnolf · CC BY-SA 3.0 · Wikimedia Commons

What is the difference between a big brown bat and a serotine bat?

Each point below is worked out from a pair of recorded values.

  • The serotine bat is heavier: 22.9 g against 16.5 g for the big brown bat, about 39% more.
  • The big brown bat is longer-lived: 19 years against 12.5 years for the serotine bat, about 52% longer.
  • Both belong to the genus Eptesicus, so they are close relatives.
  • Both are listed as Least Concern on the IUCN Red List.

Side by side

Big brown batSerotine bat
Scientific nameEptesicus fuscusEptesicus serotinus
FamilyVespertilionidaeVespertilionidae
OrderChiropteraChiroptera
Weight16.5 g – 17.2 g18.2 g – 22.9 g
LengthNot recordedNot recorded
Lifespan19 years12.5 years
Main foodNot recordedNot recorded
HabitatNot recordedwoodland
Conservation statusLeast ConcernLeast Concern
Countries recordedNot recordedNot recorded

A scale drawing needs a recorded length for both animals; only weights are on record for this pair.

Full record: Big brown batFull record: Serotine batCompare other animals