How big does a Western harvest mouse get? Here is an overview over the average adult age:
A grown Western harvest mouse (Reithrodontomys megalotis) reaches an average size of 6.9 cm (0′ 3″).
When born, they have an average size of 0 cm (0′ 0″). During their lifetime of about 1.5 years, they grow from 1 grams (0 lbs) to 10 grams (0.02 lbs). Talking about reproduction, Western harvest mouses have 4 babies about 4 times per year. The Western harvest mouse (genus: Reithrodontomys) 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.
The western harvest mouse (Reithrodontomys megalotis) is a small neotomine mouse native to most of the western United States. Many authorities consider the endangered salt marsh harvest mouse to be a subspecies, but the two are now usually treated separately.
Animals of the same family as a Western harvest mouse
We found other animals of the Muridae family:
- Summit rat with a size of 19 cm (0′ 8″)
- Juniper vole with 3 babies per litter
- Cutch rat with 5 babies per litter
- Isarog shrew-rat with a size of 18.7 cm (0′ 8″)
- Savile’s bandicoot rat with a weight of 260 grams
- Yucatan deer mouse with a size of 10 cm (0′ 4″)
- Hastings River mouse with a size of 16 cm (0′ 7″)
- Bartels’s spiny rat with a weight of 88 grams
- Lesser bamboo rat with 2 babies per litter
- Four-striped grass mouse with a size of 10.8 cm (0′ 5″)
Animals with the same size as a Western harvest mouse
Not that size really matters, but it makes things comparable. So here are a couple of animals that are as big as Western harvest mouse:
- Lowe’s shrew with a size of 6.9 cm (0′ 3″)
- Long-tongued nectar bat with a size of 6.8 cm (0′ 3″)
- Arizona shrew with a size of 5.8 cm (0′ 3″)
- Vagrant shrew with a size of 6.4 cm (0′ 3″)
- Velvety free-tailed bat with a size of 6 cm (0′ 3″)
- Pygmy short-tailed opossum with a size of 7 cm (0′ 3″)
- Ash-colored Oldfield mouse with a size of 5.7 cm (0′ 3″)
- Salt marsh harvest mouse with a size of 7 cm (0′ 3″)
- True’s shrew mole with a size of 6.5 cm (0′ 3″)
- Jamaican fruit bat with a size of 7.8 cm (0′ 4″)
Animals with the same litter size as a Western harvest mouse
Here is a list of animals that have the same number of babies per litter (4) as a Western harvest mouse:
- Desert pocket gopher
- Indian hedgehog
- Pygmy gerbil
- Gray-tailed vole
- Alpine chipmunk
- Akodon azarae
- Colorado chipmunk
- Northern collared lemming
- Pale fox
- Senegal gerbil
Animals with the same life expectancy as a Western harvest mouse
Completely different animals, but becoming as old as a Western harvest mouse:
- Texas mouse with an average maximal age of 1.5 years
- North American least shrew with an average maximal age of 1.75 years
- Southern red-backed vole with an average maximal age of 1.67 years
- Himalayan mole with an average maximal age of 1.5 years
- Brush mouse with an average maximal age of 1.5 years
- Campbell’s dwarf hamster with an average maximal age of 1.75 years
- White-eared opossum with an average maximal age of 1.67 years
- Aegialomys galapagoensis with an average maximal age of 1.67 years
- Arctic shrew with an average maximal age of 1.5 years
- Tundra vole with an average maximal age of 1.75 years
Animals with the same weight as a Western harvest mouse
As a comparison, here are some other animals that weight as much as the Reithrodontomys megalotis:
- Southern pygmy mouse bringing 9 grams to the scale
- Tasmanian pygmy possum bringing 8 grams to the scale
- Southern little yellow-eared bat bringing 8 grams to the scale
- Crowned shrew bringing 9 grams to the scale
- Western pebble-mound mouse bringing 10 grams to the scale
- Little broad-nosed bat bringing 10 grams to the scale
- Lesser hairy-footed dunnart bringing 11 grams to the scale
- Gnome fruit-eating bat bringing 10 grams to the scale
- Lesser large-footed bat bringing 8 grams to the scale
- Small bent-winged bat bringing 8 grams to the scale