Hog deer

The hog deer or 'Indian hog deer' ("Hyelaphus porcinus") is small deer. It is widespread in Asia. It lives in Pakistan, Kashmir, northern India, Nepal, Bangladesh, southwestern Yunnan Province in China, all the way to western Thailand. 
The deer gets its name from the way it runs through the forests with its head hung low so that it can duck under obstacles instead of leaping over them like most other deer. It runs with its tail erect, showing the white underside.