It is hard to guess what a Mount Pirri isthmus rat weights. But we have the answer:
An adult Mount Pirri isthmus rat (Isthmomys pirrensis) on average weights 138 grams (0.3 lbs).
The Mount Pirri isthmus rat is from the family Muridae (genus: Isthmomys). When reaching adult age, they grow up to 35.4 cm (1′ 2″). Usually, Mount Pirri isthmus rats have 2 babies per litter.
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 Mount Pirri isthmus rat (Isthmomys pirrensis) is a species of rodent in the family Cricetidae.Its natural habitat is subtropical or tropical moist lowland forests. It is found only in Panama. At the time of its discovery, it was considered as the “most common rat of southeastern Panama”. Found only in the eastern region of Darien, I. pirrensis appears to be a relict species confined to the Panamanian side of the Serrania del Darien. Its occurrence on the Colombian side of the Serrania has been suggested without documentation of specimens.Although neotomine-peromyscine rodents have historically been the subject of systematic research, studies involving Isthmomys have generally excluded I. flavidus due to its rarity in museum collections and the unavailability of tissue samples for molecular analysis. In addition, morphological and physiological studies involving I. flavidus used specimens from the Cerro Hoya locality which was originally proposed as a geographic race of I. pirrensis.
Animals of the same family as a Mount Pirri isthmus rat
We found other animals of the Muridae family:
- Winter white dwarf hamster with a weight of 30 grams
- Gorongoza gerbil with a weight of 118 grams
- Peters’s climbing rat with a weight of 182 grams
- Charming climbing mouse with a weight of 89 grams
- Sooretamys with a weight of 100 grams
- Transcaspian vole with 2 babies per litter
- Dusky field rat with a weight of 157 grams
- Squirrel-toothed rat with a weight of 511 grams
- Long-tailed vole with a weight of 44 grams
- Japanese grass vole with a weight of 29 grams
Animals with the same weight as a Mount Pirri isthmus rat
As a comparison, here are some other animals that weight as much as the Isthmomys pirrensis:
- European water vole bringing 120 grams to the scale
- Stein’s rat bringing 151 grams to the scale
- Tristram’s jird bringing 112 grams to the scale
- Harpy fruit bat bringing 135 grams to the scale
- Brants’s whistling rat bringing 129 grams to the scale
- Tanezumi rat bringing 140 grams to the scale
- Hispid cotton rat bringing 111 grams to the scale
- San Joaquin antelope squirrel bringing 160 grams to the scale
- Vinogradov’s jird bringing 117 grams to the scale
- Mindoro striped rat bringing 152 grams to the scale
Animals with the same litter size as a Mount Pirri isthmus rat
Here is a list of animals that have the same number of babies per litter (2) as a Mount Pirri isthmus rat: