Litter Size

How many babies does a Western harvest mouse have at once? (litter size)

How many baby Western harvest mouses are in a litter?

A Western harvest mouse (Reithrodontomys megalotis) usually gives birth to around 4 babies.With 4 litters per year, that sums up to a yearly offspring of 16 babies.

Each of those little ones spend around 23 days as a fetus before they are released into the wild. Upon birth, they weight 1 grams (0 lbs) and measure 4.2 cm (0′ 2″). They are a member of the Muridae family (genus: Reithrodontomys). An adult Western harvest mouse grows up to a size of 6.9 cm (0′ 3″).

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 average litter size of a Western harvest mouse is 4

The western harvest mouse (Reithrodontomys megalotis) is a small neotomine mouse native to most of the western United States. Many authorities consider the endangered salt marsh harvest mouse to be a subspecies, but the two are now usually treated separately.

Other animals of the family Muridae

Western harvest mouse is a member of the Muridae, as are these animals:

Animals that share a litter size with Western harvest mouse

Those animals also give birth to 4 babies at once:

Animals that get as old as a Western harvest mouse

Other animals that usually reach the age of 1.5 years:

Animals with the same weight as a Western harvest mouse

What other animals weight around 10 grams (0.02 lbs)?

Animals with the same size as a Western harvest mouse

Also reaching around 6.9 cm (0′ 3″) in size do these animals: