Eothenomys kageus (Eothenomys kageus)

Japanese: カゲネズミ(鹿毛鼠) - カゲネズミ（英語表記）Eothenomys kageus

A semi-subterranean mouse endemic to Japan. A rodent mammal of the Muridae family. Found in the Kanto and Chubu regions of Honshu, it mainly lives in low mountain forests, but can also be seen at around 2,400 meters above sea level on Mount Fuji and the Yatsugatake Mountains. It is about 10 cm long, with a tail of about 4 cm, and a reddish-brown dorsal body and pale orange ventral body. It is similar to the Japanese field vole, which lives in the highlands of Honshu and is also endemic to Japan, but has a shorter tail. Its eyes and ears are small, indicating its adaptation to an underground lifestyle. It digs shallow tunnels on the floor of dark forests and builds nests out of dead leaves and other materials.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

日本特産の半地下生のノネズミ。齧歯（げつし）目ネズミ科の哺乳類。本州の関東および中部地方に分布し，おもに低山の森林に生息するが，富士山や八ヶ岳では海抜2400m付近でも見られる。体長約10cm，尾長約4cm，体色は背側が赤褐色，腹側は淡いオレンジ色。同じく日本特産で，本州の高地にすむニイガタヤチネズミに似るが，尾が短い。目と耳介は小さく，地下生活への適応を示す。暗い森林の地面に浅いトンネルを掘り，枯葉などで巣をつくってすむ。

出典　株式会社平凡社世界大百科事典第２版について　情報

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