The Polynesian rat, Pacific rat or little rat, known to the Māori as 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. It shares high adaptability with other rat species extending to many environments, from grasslands to forests. It is also closely associated with humans, who provide easy access to food. It has become a major pest in most areas of its distribution.
Polynesian rat
1870 illustration of Polynesian rats, referred to as Mus novæ zelandiæ.
Rats are various medium-sized, long-tailed rodents. Species of rats are found throughout the order Rodentia, but stereotypical rats are found in the genus Rattus. Other rat genera include Neotoma, Bandicota and Dipodomys.
Rat
A rat in a suburb of Vancouver
Skeleton of a black rat (Rattus rattus) on display at the Museum of Osteology.
A closeup of a rat tail