The Tufted Deer, native to mountain forests in parts of China and (formerly?) Myanmar, is named after the pointed tuft of hair on the top of its head.
A small, dark deer with white-tipped ears, the buck has fangs or small tusks and tiny antlers; the doe (shown above) does not. Both have the tuft.
Related to the Muntjac, though a different genus, it is a little slimmer and taller, reaching some 2 foot (c.60 cm) at the shoulder.
A solitary deer rather than a herd animal.
The Tufted Deer illustrated is Michie's Tufted Deer, a subspecies from southeast China.