How many baby Pygmy rock mouses are in a litter?
A Pygmy rock mouse (Petromyscus collinus) usually gives birth to around 2 babies.With 1 litters per year, that sums up to a yearly offspring of 2 babies.
Upon birth, they weight 2 grams (0 lbs) and measure 3.3 cm (0′ 2″). They are a member of the Muridae family (genus: Petromyscus). An adult Pygmy rock mouse grows up to a size of 100 cm (3′ 4″).
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 pygmy rock mouse (Petromyscus collinus) is a species of rodent in the family Nesomyidae.It is found in Angola, Namibia, and South Africa.Its natural habitat is subtropical or tropical dry shrubland.
Other animals of the family Muridae
Pygmy rock mouse is a member of the Muridae, as are these animals:
- Smoky grass mouse weighting only 22 grams
- Red-bellied mosaic-tailed rat with 2 babies per pregnancy
- Mesquite mouse with 3 babies per pregnancy
- Lindbergh’s grass mouse weighting only 26 grams
- Bougainville naked-tailed rat weighting only 397 grams
- Chelemys macronyx with 4 babies per pregnancy
- Oecomys roberti weighting only 73 grams
- Greater bandicoot rat with 6 babies per pregnancy
- Crested-tailed deer mouse weighting only 40 grams
- Summit rat weighting only 107 grams
Animals that share a litter size with Pygmy rock mouse
Those animals also give birth to 2 babies at once:
- San Lorenzo mouse
- Southern spiny pocket mouse
- True’s shrew mole
- Bastard big-footed mouse
- White-throated woodrat
- Highland streaked tenrec
- Fawn-footed mosaic-tailed rat
- Antelope jackrabbit
- Red acouchi
- Pampas cat
Animals with the same weight as a Pygmy rock mouse
What other animals weight around 20 grams (0.04 lbs)?
- Sinaloan mastiff bat weighting 22 grams
- Velvety fruit-eating bat weighting 16 grams
- Bank vole weighting 20 grams
- Sonoran harvest mouse weighting 20 grams
- Therese’s shrew weighting 17 grams
- Veldkamp’s dwarf epauletted fruit bat weighting 21 grams
- Davis’s round-eared bat weighting 20 grams
- Lesser short-tailed gerbil weighting 17 grams
- Davies’s big-eared bat weighting 18 grams
- Lesser mouse-eared bat weighting 23 grams