What is a gayal?

gayal
   The gayal or mithan is a semidomesticated, also wild, ox, Eos frontalis, in the hilly districts of Northeast India. The gayal is smaller than the gaur, has a straight forehead without the frontal crest, smaller and straighter horns, a dewlap in the male, while the back has also a less marked slope than in the gaur. Apparently the gaur and the gayal interbreed, but the latter is of a much milder disposition.