Duikers are very primitive antelope which diverged early in bovid history. The gaur is the largest wild bovid alive today. Most of the diverse bovid species occur in Africa. The chamois is a very small bovid. They also can survive by feeding on deer or some wild bovid hosts. The mountain nyala is a large sexually dimorphic bovid. The Formosan serow is the only native bovid of Taiwan. A bovid hybrid is a hybrid of two different members of the bovid family. A vocal bovid, bird-like chirps denote curiosity in the animal. The Philippine warty pig and an extinct bovid were also present. A drinking horn is the horn of a bovid used as a drinking vessel. The horns, of medium size by large bovid standards, grow to a length of . The bushbuck is the only bovid that is both solitary and not territorial. The wild yak ("Bos mutus") is a large wild bovid native to the Himalayas. A member of this family is called a bovid.