Litter Size

How many babies does a North American beaver have at once? (litter size)

How many baby North American beavers are in a litter?

A North American beaver (Castor canadensis) usually gives birth to around 3 babies.With 1 litters per year, that sums up to a yearly offspring of 3 babies.

Each of those little ones spend around 111 days as a fetus before they are released into the wild. Upon birth, they weight 415 grams (0.91 lbs) and measure 1.7 cm (0′ 1″). They are a member of the Castoridae family (genus: Castor). An adult North American beaver grows up to a size of 75.7 cm (2′ 6″).

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 North American beaver is 3

The North American beaver (Castor canadensis) is one of two extant beaver species (the other being the Eurasian beaver, Castor fiber). It is native to North America and introduced in South America (Patagonia) and Europe (primarily Finland and Karelia). In the United States and Canada, the species is often referred to simply as “beaver”, though this causes some confusion because another distantly related rodent, Aplodontia rufa, is often called the “mountain beaver”. Other vernacular names, including American beaver and Canadian beaver, distinguish this species from the other extant beaver species, Castor fiber, which is native to Eurasia. The North American beaver is an official animal symbol of Canada and is the official state mammal of Oregon.

Other animals of the family Castoridae

North American beaver is a member of the Castoridae, as are these animals:

Animals that share a litter size with North American beaver

Those animals also give birth to 3 babies at once:

Animals that get as old as a North American beaver

Other animals that usually reach the age of 15 years:

Animals with the same weight as a North American beaver

What other animals weight around 18.11 kg (39.93 lbs)?

Animals with the same size as a North American beaver

Also reaching around 75.7 cm (2′ 6″) in size do these animals: