Litter Size

How many babies does a Java pipistrelle have at once? (litter size)

How many baby Java pipistrelles are in a litter?

A Java pipistrelle (Pipistrellus javanicus) usually gives birth to around 2 babies.

Each of those little ones spend around 71 days as a fetus before they are released into the wild. Upon birth, they weight 1 grams (0 lbs) and measure 2.3 cm (0′ 1″). They are a member of the Vespertilionidae family (genus: Pipistrellus). An adult Java pipistrelle grows up to a size of 10.5 cm (0′ 5″).

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 Java pipistrelle (Pipistrellus javanicus) is a species of pipistrelle bat found in South and Southeast Asia, including Afghanistan; Bangladesh; Brunei; Cambodia; China; India; Indonesia; Laos; Malaysia; Myanmar; Nepal; Pakistan; Philippines; Singapore; Thailand and Vietnam. It favors human habitations. A 2010 research paper from the Philippines regarding the prevalence of coronavirus in bats tested several Java pipistrelle bats.

Other animals of the family Vespertilionidae

Java pipistrelle is a member of the Vespertilionidae, as are these animals:

Animals that share a litter size with Java pipistrelle

Those animals also give birth to 2 babies at once:

Animals with the same weight as a Java pipistrelle

What other animals weight around 4 grams (0.01 lbs)?