It is hard to guess what a Japanese house bat weights. But we have the answer:
An adult Japanese house bat (Pipistrellus abramus) on average weights 5 grams (0.01 lbs).
The Japanese house bat is from the family Vespertilionidae (genus: Pipistrellus). It is usually born with about 1 grams (0 lbs). When reaching adult age, they grow up to 56 cm (1′ 11″). Usually, Japanese house bats 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 Japanese house bat or Japanese pipistrelle (Pipistrellus abramus) is a species of vesper bat. An adult has a body length of 3.6–4.8 cm (1.4–1.9 in), a tail of 2.9–4.0 cm (1.1–1.6 in), and a wing length of 3.2–3.6 cm (1.3–1.4 in). It prefers to roost under the ceiling or inside the roof of old buildings. It is found across East Asia, from China and Taiwan into the Ussuri region, the Korean Peninsula, and Japan.
Animals of the same family as a Japanese house bat
We found other animals of the Vespertilionidae family:
- Small bent-winged bat with a weight of 8 grams
- Bechstein’s bat with a weight of 9 grams
- Indiana bat with a weight of 7 grams
- Clear-winged woolly bat with a weight of 4 grams
- Flores woolly bat with a weight of 6 grams
- Groove-toothed bat with a weight of 4 grams
- Abo bat with a weight of 6 grams
- Tiny pipistrelle with a weight of 2 grams
- Hairy-tailed bat with a weight of 14 grams
- Papillose woolly bat with a weight of 10 grams
Animals with the same weight as a Japanese house bat
As a comparison, here are some other animals that weight as much as the Pipistrellus abramus:
- Cinereus shrew bringing 4 grams to the scale
- Whitaker’s shrew bringing 5 grams to the scale
- Dwarf slit-faced bat bringing 6 grams to the scale
- Malagasy mouse-eared bat bringing 5 grams to the scale
- Montane myotis bringing 5 grams to the scale
- Fly River trumpet-eared bat bringing 5 grams to the scale
- Short-eared bat bringing 5 grams to the scale
- Carmen Mountain shrew bringing 4 grams to the scale
- Lesser dwarf shrew bringing 5 grams to the scale
- Zulu serotine bringing 4 grams to the scale
Animals with the same litter size as a Japanese house bat
Here is a list of animals that have the same number of babies per litter (2) as a Japanese house bat: