Animal Age

How old does a Salt marsh harvest mouse get? (age expectancy)

What is the maximal age a Salt marsh harvest mouse reaches?

An adult Salt marsh harvest mouse (Reithrodontomys raviventris) usually gets as old as 2.58 years.

Salt marsh harvest mouses are around 22 days in the womb of their mother. When born, they weight 1 grams (0 lbs) and measure 57.5 cm (1′ 11″). As a member of the Muridae family (genus: Reithrodontomys), a Salt marsh harvest mouse caries out around 3 little ones per pregnancy, which happens around 1 times a year. Fully grown, they reach a bodylength of 7 cm (0′ 3″).

As a reference: Usually, humans get as old as 100 years, with the average being around 75 years. After being carried in the belly of their mother for 280 days (40 weeks), they grow to an average size of 1.65m (5′ 5″) and weight in at 62 kg (137 lbs), which is obviously highly individual.

A Salt marsh harvest mouse gets as old as 2.58 years

The salt marsh harvest mouse (Reithrodontomys raviventris), also known as the red-bellied harvest mouse and sometimes called the saltmarsh harvest mouse, is an endangered rodent endemic to the San Francisco Bay Area salt marshes in CA. There are two distinct subspecies, both endangered and listed together on federal and state endangered species lists. The northern subspecies (Reithrodontomys raviventris halicoetes) is lighter in color and inhabits the northern marshes of the bay, and the southern subspecies (Reithrodontomys raviventris raviventris) lives in the East and South Bay marshes. They are both quite similar in appearance to their congener species, the [Western harvest mouse, R. megalotis], to which they are not closely related. Genetic studies of the northern subspecies have revealed that the salt marsh harvest mouse is most closely related to the plains harvest mouse, R. montanus, (), which occurs now in the Midwest]. Its endangered designation is due to its limited range, historic decline in population and continuing threat of habitat loss due to development encroachment at the perimeter of San Francisco Bay.

Animals of the same family as a Salt marsh harvest mouse

Not really brothers and sisters, but from the same biological family (Muridae):

Animals that reach the same age as Salt marsh harvest mouse

With an average age of 2.58 years, Salt marsh harvest mouse are in good companionship of the following animals:

Animals with the same number of babies Salt marsh harvest mouse

The same number of babies at once (3) are born by:

Weighting as much as Salt marsh harvest mouse

A fully grown Salt marsh harvest mouse reaches around 10 grams (0.02 lbs). So do these animals:

Animals as big as a Salt marsh harvest mouse

Those animals grow as big as a Salt marsh harvest mouse: