Litter Size

How many babies does a Japanese grass vole have at once? (litter size)

How many baby Japanese grass voles are in a litter?

A Japanese grass vole (Microtus montebelli) usually gives birth to around 4 babies.

Each of those little ones spend around 22 days as a fetus before they are released into the wild. Upon birth, they weight 2 grams (0 lbs) and measure 1.8 cm (0′ 1″). They are a member of the Muridae family (genus: Microtus). An adult Japanese grass vole grows up to a size of 12.4 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 Japanese grass vole (Microtus montebelli) is a species of rodent in the family Cricetidae.It is found only in Japan.

Other animals of the family Muridae

Japanese grass vole is a member of the Muridae, as are these animals:

Animals that share a litter size with Japanese grass vole

Those animals also give birth to 4 babies at once:

Animals with the same weight as a Japanese grass vole

What other animals weight around 29 grams (0.06 lbs)?