The body color is black on the dorsal side and white on the abdominal side, but the wild ones may have a dorsal side that's bluish green or grayish brown and an abdominal side that's yellow.
体色は背中側が黒く、腹側は白いが、野生個体には背中側が青緑色や灰褐色、腹側が黄色の個体もいる。