How many baby Serotine bats are in a litter?
A Serotine bat (Eptesicus serotinus) usually gives birth to around 1 babies.With 1 litters per year, that sums up to a yearly offspring of 1 babies.
Each of those little ones spend around 65 days as a fetus before they are released into the wild. Upon birth, they weight 5 grams (0.01 lbs) and measure 3.1 cm (0′ 2″). They are a member of the Vespertilionidae family (genus: Eptesicus). An adult Serotine bat grows up to a size of 6.8 cm (0′ 3″).
To have a reference: Humans obviously usually have a litter size of one ;). Their babies are in the womb of their mother for 280 days (40 weeks) and reach an average size of 1.65m (5′ 5″). They weight in at 62 kg (137 lbs), which is obviously highly individual, and reach an average age of 75 years.
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”.
Other animals of the family Vespertilionidae
Serotine bat is a member of the Vespertilionidae, as are these animals:
- Abo bat weighting only 6 grams
- Yellow-lipped bat weighting only 5 grams
- Botswanan long-eared bat weighting only 7 grams
- White-winged serotine weighting only 5 grams
- Malagasy serotine with 1 babies per pregnancy
- Moloney’s mimic bat weighting only 8 grams
- Eisentraut’s pipistrelle weighting only 6 grams
- Evening bat with 1 babies per pregnancy
- Cave myotis becoming 11.25 years old
- Desert long-eared bat with 1 babies per pregnancy
Animals that share a litter size with Serotine bat
Those animals also give birth to 1 babies at once:
- Tree pangolin
- Commerson’s roundleaf bat
- Black flying fox
- Link rat
- Tickell’s bat
- Guinea baboon
- Onager
- Rufous elephant shrew
- White-throated guenon
- Müeller’s gibbon
Animals that get as old as a Serotine bat
Other animals that usually reach the age of 6 years:
- Dark kangaroo mouse with 5.42 years
- Yellow-pine chipmunk with 5.17 years
- Tullberg’s soft-furred mouse with 5.17 years
- European water vole with 5 years
- Brush-tailed phascogale with 5 years
- Woodland dormouse with 5.75 years
- Spinifex hopping mouse with 5.17 years
- Long-eared hedgehog with 6.75 years
- Slender mongoose with 6 years
- California ground squirrel with 5 years
Animals with the same weight as a Serotine bat
What other animals weight around 23 grams (0.05 lbs)?
- Abrothrix sanborni weighting 24 grams
- Lined pocket mouse weighting 23 grams
- Southern African spiny mouse weighting 26 grams
- Schreber’s yellow bat weighting 26 grams
- Grant’s golden mole weighting 22 grams
- Taiwan field mouse weighting 25 grams
- Abrothrix andinus weighting 24 grams
- Oligoryzomys chacoensis weighting 23 grams
- Oligoryzomys longicaudatus weighting 27 grams
- Narrow-headed slender opossum weighting 26 grams
Animals with the same size as a Serotine bat
Also reaching around 6.8 cm (0′ 3″) in size do these animals:
- Allen’s big-eared bat gets as big as 5.9 cm (0′ 3″)
- Taiga shrew gets as big as 7.5 cm (0′ 3″)
- Arizona shrew gets as big as 5.8 cm (0′ 3″)
- Greater mouse-tailed bat gets as big as 6.1 cm (0′ 3″)
- Pygmy fruit-eating bat gets as big as 5.5 cm (0′ 3″)
- Saharan shrew gets as big as 6.3 cm (0′ 3″)
- Asiatic short-tailed shrew gets as big as 6.7 cm (0′ 3″)
- Azumi shrew gets as big as 6 cm (0′ 3″)
- Eurasian harvest mouse gets as big as 5.9 cm (0′ 3″)
- Waterhouse’s leaf-nosed bat gets as big as 6.1 cm (0′ 3″)