Litter Size

How many babies does a Australian swamp rat have at once? (litter size)

How many baby Australian swamp rats are in a litter?

A Australian swamp rat (Rattus lutreolus) usually gives birth to around 4 babies.With 2 litters per year, that sums up to a yearly offspring of 8 babies.

Each of those little ones spend around 24 days as a fetus before they are released into the wild. Upon birth, they weight 4 grams (0.01 lbs) and measure 4.4 cm (0′ 2″). They are a member of the Muridae family (genus: Rattus). An adult Australian swamp rat grows up to a size of 16 cm (0′ 7″).

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 Australian swamp rat is 4

The Australian swamp rat (Rattus lutreolus), also known as the eastern swamp rat, is a species of rat native to the coasts of southern and eastern Australia.

Other animals of the family Muridae

Australian swamp rat is a member of the Muridae, as are these animals:

Animals that share a litter size with Australian swamp rat

Those animals also give birth to 4 babies at once:

Animals that get as old as a Australian swamp rat

Other animals that usually reach the age of 2.42 years:

Animals with the same weight as a Australian swamp rat

What other animals weight around 106 grams (0.23 lbs)?

Animals with the same size as a Australian swamp rat

Also reaching around 16 cm (0′ 7″) in size do these animals: