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Its sex chromosomes are abnormally large, while the other two species in Tokudaia have lost their Y chromosome. [3] It is found only on the northern part (Yanbaru area) of the island, above 300 m, [1] and is thought to inhabit an area of less than 3 km 2. [4] The head and body are up to 7 inches long with a 5-inch tail. They weigh up to 7 ounces.
Tokudaia is a genus of murine rodent native to Japan. [1] Known as Ryūkyū spiny rats or spinous country-rats , population groups exist on several non-contiguous islands. [ 2 ] Despite differences in name and appearance, they are the closest living relatives of the Eurasian field mouse ( Apodemus ).
This is a list of mammal species recorded in Japan (excluding domesticated and captive populations). Of the 172 [1] species of mammal found—112 native terrestrial mammals (those that are endemic are identified below; this number includes 37 species of bat), 19 introduced species, 40 species of Cetacea, and the dugong—161 are listed for the Japan region on the IUCN Red List of Threatened ...
The species appears to be present on all Japanese islands. It inhabits forests, grasslands, and cultivated fields, including rice paddies, at any altitude. [1] Though occupying the same broad ecological niche as A. argenteus, the two species prefer different microhabitats: A. argenteus prefers dense canopy, while A. speciosus prefers open secondary forests.
1.1 Mammals. 1.2 Birds. 1.3 Marine ... Large Japanese field mouse ... a species of venomous snake that exists in all areas of Japan except certain islands including ...
The Japanese dormouse (Glirulus japonicus) is a species of rodent in the family Gliridae endemic to Japan. It is the only extant species within the genus Glirulus. [2] Its natural habitat is temperate forests. In Japanese, it is called yamane (やまね or 山鼠). Among dormice, it has the special ability of running at great speed upside down ...
Dormice are small rodents, with body lengths between 6 and 19 cm (2.4 and 7.5 in), and weight between 15 and 180 g (0.53 and 6.35 oz). [6] They are generally mouse-like in appearance, but with furred tails. They are largely arboreal, agile, and well adapted to climbing. Most species are nocturnal.
Martes melampus (Japanese marten) Honshu native, invasive in Hokkaido and Sado Island ; Muntiacus reevesi (Reeves's muntjac) Mus musculus (house mouse) - Nationwide. [8] Mustela itatsi (Japanese weasel) Honshu native, invasive in Hokkaido ; Mustela sibirica (Siberian weasel) Myocastor coypus (coypu, nutria) - Western Japan. [9] [10]