Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. Cuanza vlei rat -  The Cuanza Vlei Rat (Otomys cuanzensis) is a species of rodent in the family Muridae.It is found only in Angola.Its natural habitats are subtropical or tropical high-altitude grassland and swamps.
The answer to this question is:
Animal