Litter Size

How many babies does a Common rock rat have at once? (litter size)

How many baby Common rock rats are in a litter?

A Common rock rat (Zyzomys argurus) usually gives birth to around 2 babies.

Each of those little ones spend around 25 days as a fetus before they are released into the wild. Upon birth, they weight 3 grams (0.01 lbs) and measure 11.1 cm (0′ 5″). They are a member of the Muridae family (genus: Zyzomys). An adult Common rock rat grows up to a size of 10.7 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 common rock rat (Zyzomys argurus) is a species of rodent in the family Muridae. It is found only in Australia, where it lives in the rocky areas of woodlands, grasslands and low open forests, particularly on the talus, or scree, of cliff slopes. As a nocturnal animal, it spends the daytime nesting in cool rock crevices. Direct exposure to the sun can quickly result in heat stroke and death.The rock rat is an overall golden brown with white belly. It can weigh anywhere 25–65 grams, with a head to body length of 85–140 mm. The thick tail is 90–125 mm long and contains fat deposits. The tail is covered in overlapping scales and sparse hairs. The skin of the tail can easily be pulled off, allowing the animal to escape predators in some situations (this function is similar to that of lizard tail autotomy).They are sexually mature at 5 to 6 months of age. The females have 4 nipples but litters average 2 to 3 offspring. Gestation is about 35 days. By the 10th day, the offspring are covered in fur, and by the 12th day their eyes are open. They are weaned by 4 weeks of age. The life span of the Common Rock Rat in the wild is unknown, but an age of 4.2 years in captivity has been reported.Their diet consists of plant matter, grasses, seeds, fungi and insects.. One was observed in Maguk, Kakadu National Park, tucking into a plate of custard and rice pudding that someone had left unattended (Goodfellow, Fauna of Kakadu and the Top End, 1993).

Other animals of the family Muridae

Common rock rat is a member of the Muridae, as are these animals:

Animals that share a litter size with Common rock rat

Those animals also give birth to 2 babies at once:

Animals with the same weight as a Common rock rat

What other animals weight around 40 grams (0.09 lbs)?

Animals with the same size as a Common rock rat

Also reaching around 10.7 cm (0′ 5″) in size do these animals: