It is hard to guess what a Java pipistrelle weights. But we have the answer:
An adult Java pipistrelle (Pipistrellus javanicus) on average weights 4 grams (0.01 lbs).
The Java pipistrelle is from the family Vespertilionidae (genus: Pipistrellus). When reaching adult age, they grow up to 12.18 meter (40′ 0″). Usually, Java pipistrelles have 2 babies per litter.
As a reference: An average human weights in at 62 kg (137 lbs) and reaches an average size of 1.65m (5′ 5″). Humans spend 280 days (40 weeks) in the womb of their mother and reach around 75 years of age.
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.
Animals of the same family as a Java pipistrelle
We found other animals of the Vespertilionidae family:
- Hairy-legged myotis with a weight of 5 grams
- Hairy-tailed bat with a weight of 14 grams
- Greater bamboo bat with a weight of 7 grams
- Seminole bat with a weight of 9 grams
- Beatrix’s bat with a weight of 7 grams
- Pallid bat with a weight of 22 grams
- Gould’s long-eared bat with a weight of 11 grams
- Rafinesque’s big-eared bat with a weight of 9 grams
- Southern forest bat with a weight of 5 grams
- Tickell’s bat with a weight of 16 grams
Animals with the same weight as a Java pipistrelle
As a comparison, here are some other animals that weight as much as the Pipistrellus javanicus:
- Cinereus shrew bringing 4 grams to the scale
- Somali serotine bringing 4 grams to the scale
- Proboscis bat bringing 4 grams to the scale
- Borneo roundleaf bat bringing 4 grams to the scale
- Slender shrew bringing 4 grams to the scale
- Yellow-lipped bat bringing 4 grams to the scale
- Delany’s mouse bringing 4 grams to the scale
- Black-winged little yellow bat bringing 4 grams to the scale
- Doucet’s musk shrew bringing 4 grams to the scale
- Painted bat bringing 4 grams to the scale
Animals with the same litter size as a Java pipistrelle
Here is a list of animals that have the same number of babies per litter (2) as a Java pipistrelle: