or mouse deer Any of several species (family Tragulidae) of small, delicately built ruminants of Asia and Africa. Resembling tiny deer, chevrotains stand about 12 in. (30 cm) at the shoulder and seem to walk on their hooftips. Their fur is reddish brown with spots and pale stripes. Males have small, curved tusks protruding downward from the upper jaw. Shy and solitary, they are active at night. Asiatic chevrotains are found in forests from India to the Philippines. The water chevrotain of western equatorial Africa inhabits thick cover on the banks of rivers and seeks escape in the water when disturbed