Subfamily Mustelinae Scientific name Mustela itatsi Rank Species | Phylum Chordata Genus Mustela Higher classification Weasel | |
 | ||
Similar Weasel, Indonesian mountain weasel, Back‑striped weasel, Colombian weasel, Amazon weasel | ||
Japanese weasel
The Japanese weasel (Mustela itatsi) is a carnivorous mammal belonging to the genus Mustela in the family Mustelidae. It is native to Japan where it occurs on the islands of Honshū, Kyūshū and Shikoku. It has been introduced to Hokkaidō and the Ryukyu Islands to control rodents and has also been introduced to Sakhalin island in Russia.
Contents
It is often classified as a subspecies of the Siberian weasel (M. sibirica). The two species are very similar in appearance but differ in the ratio of tail length to head and body length. There are also genetic differences which suggest that the two diverged around 1.6-1.7 million years ago. Their ranges now overlap in western Japan where the Siberian weasel has been introduced.
Adult males of the Japanese weasel can reach 35 cm (14 in) in body length with a tail length of up to 17 cm (6.7 in). Females are smaller. The fur is orange-brown with darker markings on the head. The species typically occurs in mountainous or forested areas near water. Its diet includes mice, frogs, reptiles, insects and crayfish.
Japanese weasel itachi
