Deer are ruminant mammals that belong to the Cervidae family. One of the hallmark of deer is the antler (deer horn), and not the horn, which is the growth of bone that develops annually (usually in summer) especially on the stag (although there are some exceptions).
Deer composed of Sambar, Timor deer, Deer Bawean, and Kijang. Based on his body structure, Sambar has the largest size followed by Timor Deer and Deer Bawean. While the Kijang is the smallest type.