How many baby Altai birch mouses are in a litter?
A Altai birch mouse (Sicista napaea) usually gives birth to around 3 babies.With 1 litters per year, that sums up to a yearly offspring of 3 babies.
Each of those little ones spend around 20 days as a fetus before they are released into the wild. Upon birth, they weight 24 grams (0.05 lbs) and measure 1.6 cm (0′ 1″). They are a member of the Dipodidae family (genus: Sicista). An adult Altai birch mouse grows up to a size of 18.5 cm (0′ 8″).
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 Altai birch mouse (Sicista napaea) is a species of rodent in the family Dipodidae. It is native to Russia and Kazakhstan.
Other animals of the family Dipodidae
Altai birch mouse is a member of the Dipodidae, as are these animals:
- Southern birch mouse weighting only 11 grams
- Bobrinski’s jerboa with 5 babies per pregnancy
- Blanford’s jerboa with 4 babies per pregnancy
- Thick-tailed three-toed jerboa with 3 babies per pregnancy
- Western jumping mouse with 5 babies per pregnancy
- Thick-tailed pygmy jerboa with 2 babies per pregnancy
- Woodland jumping mouse with 4 babies per pregnancy
- Great jerboa with 3 babies per pregnancy
- Lesser Egyptian jerboa with 3 babies per pregnancy
- Dwarf fat-tailed jerboa with 3 babies per pregnancy
Animals that share a litter size with Altai birch mouse
Those animals also give birth to 3 babies at once:
- Four-toed hedgehog
- Horsfield’s shrew
- Eastern woodrat
- Black-tailed dasyure
- Hispid pocket mouse
- Mount Kahuzi climbing mouse
- Brush rabbit
- Plains harvest mouse
- Jackson’s shrew
- Slender harvest mouse
Animals with the same weight as a Altai birch mouse
What other animals weight around 10 grams (0.02 lbs)?
- Thomas’s horseshoe bat weighting 8 grams
- Schneider’s leaf-nosed bat weighting 10 grams
- Triaenops rufus weighting 9 grams
- White-bellied lesser house bat weighting 10 grams
- Gray climbing mouse weighting 9 grams
- Arcuate horseshoe bat weighting 8 grams
- Negros shrew weighting 11 grams
- Gervais’s fruit-eating bat weighting 12 grams
- Northern birch mouse weighting 8 grams
- Lesser large-headed shrew weighting 12 grams