The 駮(Bo) is shaped like a horse, with a white body, a black tail, a single horn, tiger-like teeth and claws, and a call that sounds like the beating of a drum. It can eat tigers and leopards, and people can use it to defend against the damage of weapons.
《山海經·西次四經》
又西三百裏，曰中曲之山，其陽多玉，其陰多雄黃、白玉及金。有獸焉，其狀如馬而白身黑尾，一角，虎牙爪，音如鼓音，其名曰駮，是食虎豹，可以禦兵。