Litter Size

How many babies does a Pygmy rock mouse have at once? (litter size)

How many baby Pygmy rock mouses are in a litter?

A Pygmy rock mouse (Petromyscus collinus) usually gives birth to around 2 babies.With 1 litters per year, that sums up to a yearly offspring of 2 babies.

Upon birth, they weight 2 grams (0 lbs) and measure 3.3 cm (0′ 2″). They are a member of the Muridae family (genus: Petromyscus). An adult Pygmy rock mouse grows up to a size of 100 cm (3′ 4″).

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 pygmy rock mouse (Petromyscus collinus) is a species of rodent in the family Nesomyidae.It is found in Angola, Namibia, and South Africa.Its natural habitat is subtropical or tropical dry shrubland.

Other animals of the family Muridae

Pygmy rock mouse is a member of the Muridae, as are these animals:

Animals that share a litter size with Pygmy rock mouse

Those animals also give birth to 2 babies at once:

Animals with the same weight as a Pygmy rock mouse

What other animals weight around 20 grams (0.04 lbs)?