How many baby Savi’s pipistrelles are in a litter?
A Savi’s pipistrelle (Pipistrellus savii) usually gives birth to around 2 babies.With 1 litters per year, that sums up to a yearly offspring of 2 babies.
Upon birth, they weight 1 grams (0 lbs) and measure 2 cm (0′ 1″). They are a member of the Vespertilionidae family (genus: Pipistrellus). An adult Savi’s pipistrelle grows up to a size of 4.4 cm (0′ 2″).
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.
Savi’s pipistrelle (Hypsugo savii sometimes classified as Pipistrellus savii) is a species of vesper bat found across North West Africa, the Mediterranean region and the Middle East. It feeds at night on flying insects. In the summer it roosts under bark, in holes in trees, in old buildings and in rock crevices but in winter it prefers roosts where the temperature is more even such as caves, underground vaults and deep rock cracks.
Other animals of the family Vespertilionidae
Savi’s pipistrelle is a member of the Vespertilionidae, as are these animals:
- Least woolly bat weighting only 2 grams
- Black-gilded pipistrelle weighting only 10 grams
- Zulu serotine weighting only 4 grams
- Melck’s house bat with 1 babies per pregnancy
- Cape hairy bat weighting only 13 grams
- Nyctophilus arnhemensis weighting only 6 grams
- Black myotis becoming 3.5 years old
- Chocolate wattled bat with 1 babies per pregnancy
- Argentine brown bat with 1 babies per pregnancy
- Black-gilded pipistrelle weighting only 10 grams
Animals that share a litter size with Savi’s pipistrelle
Those animals also give birth to 2 babies at once:
- California red tree mouse
- Indian grey mongoose
- White-throated woodrat
- Grey-bellied squirrel
- Unalaska collared lemming
- Desert woodrat
- African civet
- White-footed tamarin
- Kimberley rock rat
- Mayor’s mouse
Animals with the same weight as a Savi’s pipistrelle
What other animals weight around 6 grams (0.01 lbs)?
- Emilia’s gracile opossum weighting 7 grams
- Silky pocket mouse weighting 7 grams
- Indiana bat weighting 7 grams
- Little Japanese horseshoe bat weighting 7 grams
- Silver-tipped myotis weighting 5 grams
- Large forest bat weighting 6 grams
- Rendall’s serotine weighting 6 grams
- Jones’s roundleaf bat weighting 5 grams
- Raffray’s sheath-tailed bat weighting 5 grams
- Dormer’s bat weighting 6 grams