Williamson's Chevrotain

Williamson's mouse-deer is a tawny colored ungulate with a darker head and a white underbelly. It has a white triangular patch on the throat with a tawny border. Williamson's mouse-deer measures around 0.47 m (1 ft 7 in) long and weighs around 3.5 kg (7.7 lb) making it significantly larger than most other mouse-deer.

Williamson's mouse-deer is found in Thailand and in the Yunnan province of southern China. It favors low-altitude habitats with dense foliage along the banks of rivers or streams. Williamson's mouse-deer demonstrates a preference for areas populated by fig trees, Burmese grapes, Alpinia kwangsiensis, and Phrynium capitatum. Williamson's mouse-deer is crepuscular. This may enable it to avoid competition with larger herbivores such as boars, muntjacs, sambars, and serows, all of which are more active nocturnally than the mouse-deer.