The Sika deer also known as the spotted deer or the Japanese deer, is a species of deer native to much of East Asia, and introduced to various other parts of the world. Sika deer are either small or medium sized, depending on where they live. They all have a very small head and short legs. The males' antlers generally have three or four points on them, though some with a more dominant role have more. Females have two black bumps on their head instead. Sika deer are yellow brown to reddish-brown, and they have a dark dorsal stripe which is surrounded in the summer by white spots. During winter, their color is dark gray to black with no spots or just very faint ones.