How many baby Northwestern deer mouses are in a litter?
A Northwestern deer mouse (Peromyscus keeni) usually gives birth to around 5 babies.With 2 litters per year, that sums up to a yearly offspring of 10 babies.
Upon birth, they weight 8 grams (0.02 lbs) and measure 2.9 cm (0′ 2″). They are a member of the Cricetidae family (genus: Peromyscus). An adult Northwestern deer mouse grows up to a size of 9.3 cm (0′ 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 northwestern deer mouse or Keen’s mouse (Peromyscus keeni) is a species of rodent in the family Cricetidae. It is found in British Columbia in Canada and in Alaska and Washington in the United States. It was named after the Rev. John Henry Keen in 1894.According to the study from “Spatial Variation in Population Dynamics of Sitka Mice in Floodplain Forests” which was published by Thomas A. Hanley and Jeffrey C. Barnard, the sitka mouse or Northwestern deer mouse has an interesting perspective regarding the floodplain and habitat. The article has done an experiment testing the relationship between floodplain habitat and has concluded that the floodplain forset does not necessarily makes a favorable habitat for sitka mouse.
Other animals of the family Cricetidae
Northwestern deer mouse is a member of the Cricetidae, as are these animals:
- Pleasant bolo mouse weighting only 27 grams
- Northern red-backed vole with 5 babies per pregnancy
- Sikkim mountain vole with 2 babies per pregnancy
- Southern big-eared mouse with 4 babies per pregnancy
- Hylaeamys laticeps weighting only 49 grams
- Handleyomys fuscatus weighting only 49 grams
- Grey red-backed vole with 5 babies per pregnancy
- Taiwan vole with 1 babies per pregnancy
- White-tipped Oldfield mouse raching a size of 11.4 cm (0′ 5″)
- Middendorf’s vole with 5 babies per pregnancy
Animals that share a litter size with Northwestern deer mouse
Those animals also give birth to 5 babies at once:
- Uinta ground squirrel
- Lorrain dormouse
- Dark bolo mouse
- Great Balkhan mouse-like hamster
- Least weasel
- Pygmy rabbit
- Lesser hedgehog tenrec
- Silent dormouse
- Montane vole
- Tristram’s jird
Animals with the same weight as a Northwestern deer mouse
What other animals weight around 28 grams (0.06 lbs)?
- Oligoryzomys chacoensis weighting 23 grams
- White-footed vole weighting 23 grams
- Long-tailed house bat weighting 30 grams
- Sandstone false antechinus weighting 23 grams
- Fire-bellied brush-furred rat weighting 32 grams
- Eastern pygmy possum weighting 27 grams
- New Guinea free-tailed bat weighting 26 grams
- Palawan pencil-tailed tree mouse weighting 28 grams
- Dragon tube-nosed fruit bat weighting 30 grams
- Long-eared flying mouse weighting 27 grams
Animals with the same size as a Northwestern deer mouse
Also reaching around 9.3 cm (0′ 4″) in size do these animals:
- Savanna path shrew gets as big as 8.8 cm (0′ 4″)
- Salvin’s spiny pocket mouse gets as big as 10.8 cm (0′ 5″)
- Campbell’s dwarf hamster gets as big as 9.1 cm (0′ 4″)
- Northwestern deer mouse gets as big as 9.3 cm (0′ 4″)
- Desert mouse gets as big as 8.8 cm (0′ 4″)
- New Holland mouse gets as big as 8.2 cm (0′ 4″)
- Rudd’s mouse gets as big as 9.3 cm (0′ 4″)
- Northern grasshopper mouse gets as big as 10.3 cm (0′ 5″)
- Pallas’s pika gets as big as 8.2 cm (0′ 4″)
- Juliana’s golden mole gets as big as 10 cm (0′ 4″)