What is the maximal age a Serotine bat reaches?
An adult Serotine bat (Eptesicus serotinus) usually gets as old as 6 years.
Serotine bats are around 65 days in the womb of their mother. When born, they weight 5 grams (0.01 lbs) and measure 8 cm (0′ 4″). As a member of the Vespertilionidae family (genus: Eptesicus), a Serotine bat caries out around 1 little ones per pregnancy, which happens around 1 times a year. Fully grown, they reach a bodylength of 6.8 cm (0′ 3″).
As a reference: Usually, humans get as old as 100 years, with the average being around 75 years. After being carried in the belly of their mother for 280 days (40 weeks), they grow to an average size of 1.65m (5′ 5″) and weight in at 62 kg (137 lbs), which is obviously highly individual.

The serotine bat (Eptesicus serotinus), also known as the common serotine bat, big brown bat, or silky bat, is a fairly large Eurasian bat with quite large ears. It has a wingspan of around 37 cm (15 in) and often hunts in woodland. It sometimes roosts in buildings, hanging upside down, in small groups or individually. The name serotine is derived from the Latin serotinus which means “evening”, while the generic name derives from the Greek ἔπιεν and οίκος which means “house flyer”.
Animals of the same family as a Serotine bat
Not really brothers and sisters, but from the same biological family (Vespertilionidae):
- Cinnamon myotis bringing the scale to 4 grams
- Daubenton’s bat becoming 28 years old
- Southern yellow bat with 2 babies per pregnancy
- Hodgson’s bat bringing the scale to 7 grams
- Black-gilded pipistrelle bringing the scale to 10 grams
- Greenish yellow bat with 2 babies per pregnancy
- Kelaart’s pipistrelle with 1 babies per pregnancy
- Malagasy mouse-eared bat bringing the scale to 5 grams
- Diminutive serotine bringing the scale to 6 grams
- Western broad-nosed bat with 1 babies per pregnancy
Animals that reach the same age as Serotine bat
With an average age of 6 years, Serotine bat are in good companionship of the following animals:
- Canyon bat usually reaching 6 years
- Kowari usually reaching 7 years
- Evening bat usually reaching 5 years
- Virginia opossum usually reaching 5 years
- Meadow jumping mouse usually reaching 5 years
- Hairy-tailed mole usually reaching 5 years
- Musky rat-kangaroo usually reaching 6 years
- Scaly-tailed possum usually reaching 6 years
- Tullberg’s soft-furred mouse usually reaching 5.17 years
- Greater grison usually reaching 5.25 years
Animals with the same number of babies Serotine bat
The same number of babies at once (1) are born by:
- Malagasy giant rat
- Dusky pademelon
- Sangihe tarsier
- South American sea lion
- Greater false vampire bat
- Black-crested Sumatran langur
- Lesser kudu
- Western tree hyrax
- Western long-tongued bat
- Guam flying fox
Weighting as much as Serotine bat
A fully grown Serotine bat reaches around 23 grams (0.05 lbs). So do these animals:
- Wood mouse with 21 grams
- Aberdare mole shrew with 23 grams
- Indomalayan pencil-tailed tree mouse with 23 grams
- Woodland dormouse with 20 grams
- Agile antechinus with 22 grams
- African yellow bat with 25 grams
- Creeping vole with 20 grams
- Tonatia carrikeri with 22 grams
- Savi’s pine vole with 20 grams
- White-eared pocket mouse with 23 grams
Animals as big as a Serotine bat
Those animals grow as big as a Serotine bat:
- Northern groove-toothed shrew mouse with 8.1 cm (0′ 4″)
- Velvety free-tailed bat with 6 cm (0′ 3″)
- Inquisitive shrew mole with 7.5 cm (0′ 3″)
- Sinaloan pocket mouse with 7.1 cm (0′ 3″)
- Hose’s pygmy flying squirrel with 7.8 cm (0′ 4″)
- Whitaker’s shrew with 6.1 cm (0′ 3″)
- Large slit-faced bat with 7.5 cm (0′ 3″)
- Azumi shrew with 6 cm (0′ 3″)
- Hodgson’s brown-toothed shrew with 6.5 cm (0′ 3″)
- North American least shrew with 6.8 cm (0′ 3″)
