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Animal Size

Allen’s cotton rat size: How big do they get?

How big does a Allen’s cotton rat get? Here is an overview over the average adult age:

A grown Allen’s cotton rat (Sigmodon alleni) reaches an average size of 17 cm (0′ 7″).

When born, they have an average size of 0 cm (0′ 0″). A full-grown exemplary reaches roughly 174 grams (0.38 lbs). The Allen’s cotton rat (genus: Sigmodon) is a member of the family Muridae.

As a reference: Humans reach an average body size of 1.65m (5′ 5″) while carrying 62 kg (137 lbs). A human woman is pregnant for 280 days (40 weeks) and on average become 75 years old.

Allen’s cotton rat (Sigmodon alleni) is a species of rodent in the family Cricetidae. It is endemic to western Mexico, where its distribution extends from Sinaloa to Oaxaca. The formerly recognized S. planifrons and S. vulcani are now considered conspecific with S. alleni by the IUCN.This species lives in tropical and mixed forests. It creates runways in grassy areas and constructs nests out of grass in logs, under rocks, and in clumps of vegetation. It is affected by deforestation in its native range.

Animals of the same family as a Allen’s cotton rat

We found other animals of the Muridae family:

Animals with the same size as a Allen’s cotton rat

Not that size really matters, but it makes things comparable. So here are a couple of animals that are as big as Allen’s cotton rat:

Animals with the same weight as a Allen’s cotton rat

As a comparison, here are some other animals that weight as much as the Sigmodon alleni: