The Common Fat-tailed Mouse Opossum (Thylamys pusillus) is a species of opossum in the family Didelphidae. It occurs in Argentina Bolivia Brazil and Paraguay in chaco and Andean foothill habitats. Its head-and-body length is about 75 to 120 (mean 94.3) mm and its tail length is about 90 to 134 (mean 103.6) mm. Its dorsal fur is brownish gray and its ventral fur is yellowish to white. The legs and cheeks are the same color as the ventral surface. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
Animal