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The best-known rat species are the black rat (Rattus rattus) and the brown rat (Rattus norvegicus). This group, generally known as the Old World rats or true rats, originated in Asia. Rats are bigger than most Old World mice, which are their relatives, but seldom weigh over 500 grams (17 + 1 ⁄ 2 oz) in the wild. [2]
This is an accepted version of this page This is the latest accepted revision, reviewed on 18 January 2025. Order of mammals Rodent Temporal range: Late Paleocene – recent Pre๊ ๊ O S D C P T J K Pg N Capybara Springhare Golden-mantled ground squirrel North American beaver House mouse Scientific classification Domain: Eukaryota Kingdom: Animalia Phylum: Chordata Class: Mammalia Mirorder ...
The central rock rat is one of five rock rat species native to Australia. It is a nocturnal species that forages for food at nighttime. [5] [6] [7] They can range from 10.6 to 14.9 cm (4.2 to 5.9 in) long for the head and body, and around 30 cm (12 in) from head to tail. [3]
Kangaroo rats, small mostly nocturnal rodents of genus Dipodomys, are native to arid areas of western North America.The common name derives from their bipedal form. They hop in a manner similar to the much larger kangaroo, but developed this mode of locomotion independently, like several other clades of rodents (e.g., dipodids and hopping mice).
Tails cast in this manner generally grow back over time, though the replacement is typically darker in colour than the original and contains only cartilage, not bone. [14] Various species of rat demonstrate a similar function with their tails, known as degloving, in which the outer layer is shed in order for the animal to escape from a predator ...
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The Polynesian rat, Pacific rat or little rat (Rattus exulans), or kiore, is the third most widespread species of rat in the world behind the brown rat and black rat.Contrary to its vernacular name, the Polynesian rat originated in Southeast Asia, and like its relatives has become widespread, migrating to most of Polynesia, including New Zealand, Easter Island, and Hawaii.