Litter Size

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

How many baby Common marmosets are in a litter?

A Common marmoset (Callithrix jacchus) usually gives birth to around 2 babies.

Each of those little ones spend around 144 days as a fetus before they are released into the wild. Upon birth, they weight 27 grams (0.06 lbs) and measure 12.5 cm (0′ 5″). They are a member of the Callitrichidae family (genus: Callithrix). An adult Common marmoset grows up to a size of 24 cm (0′ 10″).

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 Common marmoset is 2

The common marmoset (Callithrix jacchus) is a New World monkey. It originally lived on the northeastern coast of Brazil, in the states of Piaui, Paraiba, CearĂ¡, Rio Grande do Norte, Pernambuco, Alagoas and Bahia. Through release (both intentional and unintentional) of captive individuals, it has expanded its range since the 1920s to Southeast Brazil (its first sighting in the wild for Rio de Janeiro was in 1929), where it became an invasive species, raising concerns about genetic pollution of similar species, such as the buffy-tufted marmoset (Callithrix aurita), and predation upon bird nestlings and eggs.The whole-genome sequence of a female common marmoset was published on 20 July 2014. It became the first New World Monkey to have its genome sequenced.

Other animals of the family Callitrichidae

Common marmoset is a member of the Callitrichidae, as are these animals:

Animals that share a litter size with Common marmoset

Those animals also give birth to 2 babies at once:

Animals that get as old as a Common marmoset

Other animals that usually reach the age of 16.75 years:

Animals with the same weight as a Common marmoset

What other animals weight around 291 grams (0.64 lbs)?