It is hard to guess what a Ryukyu spiny rat weights. But we have the answer:
An adult Ryukyu spiny rat (Tokudaia osimensis) on average weights 84 grams (0.19 lbs).
The Ryukyu spiny rat is from the family Muridae (genus: Tokudaia). When reaching adult age, they grow up to 56.6 cm (1′ 11″).
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 Ryukyu spiny rat (Tokudaia osimensis) is a species of rodent in the family Muridae. Endemic to Amami Ōshima island in the Amami Islands of the Ryukyu archipelago of Japan, its natural habitat is subtropical moist broadleaf forest. The karyotype has an odd diploid number, 2n = 25. Like its relative T. tokunoshimensis, it has lost its Y chromosome and SRY gene.The species is threatened by habitat destruction and fragmentation, predation by feral cats and dogs and introduced mongooses, and competition with introduced black rats.
Animals of the same family as a Ryukyu spiny rat
We found other animals of the Muridae family:
- Coxing’s white-bellied rat with a weight of 80 grams
- Roborovski dwarf hamster with a size of 7.2 cm (0′ 3″)
- Daphne’s Oldfield mouse with a weight of 77 grams
- Bank vole with a weight of 20 grams
- Peters’s climbing rat with a weight of 182 grams
- Nephelomys levipes with a weight of 60 grams
- Sikkim rat with a size of 19 cm (0′ 8″)
- Oecomys paricola with a weight of 73 grams
- Least groove-toothed swamp rat with a weight of 50 grams
- Neacomys spinosus with a weight of 19 grams
Animals with the same weight as a Ryukyu spiny rat
As a comparison, here are some other animals that weight as much as the Tokudaia osimensis:
- Bramble Cay melomys bringing 100 grams to the scale
- Water vole (North America) bringing 92 grams to the scale
- Tanala tufted-tailed rat bringing 90 grams to the scale
- Nelson’s kangaroo rat bringing 87 grams to the scale
- Bougainville mosaic-tailed rat bringing 86 grams to the scale
- Boehm’s bush squirrel bringing 70 grams to the scale
- Eastern chestnut mouse bringing 79 grams to the scale
- Bolivian big-eared mouse bringing 71 grams to the scale
- Blind mole bringing 70 grams to the scale
- Big-eared climbing rat bringing 86 grams to the scale