It is hard to guess what a Western harvest mouse weights. But we have the answer:
An adult Western harvest mouse (Reithrodontomys megalotis) on average weights 10 grams (0.02 lbs).
The Western harvest mouse is from the family Muridae (genus: Reithrodontomys). It is usually born with about 1 grams (0 lbs). They can live for up to 1.5 years. When reaching adult age, they grow up to 6.9 cm (0′ 3″). On average, Western harvest mouses can have babies 4 times per year with a litter size of 4.
As a reference: An average human weights in at 62 kg (137 lbs) and reaches an average size of 1.65m (5′ 5″). Humans spend 280 days (40 weeks) in the womb of their mother and reach around 75 years of age.
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:
- Amazonian marsh rat with a weight of 120 grams
- Microryzomys altissimus with a weight of 13 grams
- Gray tree rat with a weight of 150 grams
- Savi’s pine vole with a weight of 20 grams
- Gray spiny mouse with a size of 8.4 cm (0′ 4″)
- Sandy inland mouse with a weight of 14 grams
- Lesser hamster-rat with a weight of 75 grams
- Cutch rat with 5 babies per litter
- White-throated woodrat with a weight of 208 grams
- Incan hocicudo with a weight of 34 grams
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:
- Cowan’s shrew tenrec bringing 12 grams to the scale
- Darling’s horseshoe bat bringing 8 grams to the scale
- Orange leaf-nosed bat bringing 8 grams to the scale
- Mexican free-tailed bat bringing 12 grams to the scale
- Drouhard’s shrew tenrec bringing 10 grams to the scale
- Common bent-wing bat bringing 10 grams to the scale
- Moloney’s mimic bat bringing 8 grams to the scale
- Large-eared horseshoe bat bringing 10 grams to the scale
- Lesser large-footed bat bringing 8 grams to the scale
- Chestnut long-tongued bat bringing 8 grams to the scale
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:
- Antillean fruit-eating bat with a size of 8.1 cm (0′ 4″)
- North American least shrew with a size of 6.8 cm (0′ 3″)
- Lesser mouse-tailed bat with a size of 5.9 cm (0′ 3″)
- White-eared pocket mouse with a size of 7.5 cm (0′ 3″)
- Madagascar sucker-footed bat with a size of 5.8 cm (0′ 3″)
- Vagrant shrew with a size of 6.4 cm (0′ 3″)
- Azumi shrew with a size of 6 cm (0′ 3″)
- Common noctule with a size of 7.5 cm (0′ 3″)
- Cinereus shrew with a size of 5.7 cm (0′ 3″)
- Ash-colored Oldfield mouse with a size of 5.7 cm (0′ 3″)
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:
- Lesser short-tailed gerbil
- Zygodontomys brevicauda
- Shrew gymnure
- Red fox
- Blanford’s jerboa
- European water vole
- New Holland mouse
- Tien Shan red-backed vole
- Senegal gerbil
- Tondano rat
Animals with the same life expectancy as a Western harvest mouse
Completely different animals, but becoming as old as a Western harvest mouse:
- Tundra vole with an average maximal age of 1.75 years
- Montane shrew with an average maximal age of 1.33 years
- Trowbridge’s shrew with an average maximal age of 1.5 years
- Texas mouse with an average maximal age of 1.5 years
- Aegialomys galapagoensis with an average maximal age of 1.67 years
- Cotton mouse with an average maximal age of 1.25 years
- Long-tailed planigale with an average maximal age of 1.25 years
- Brush mouse with an average maximal age of 1.5 years
- White-eared opossum with an average maximal age of 1.67 years
- Long-clawed shrew with an average maximal age of 1.5 years