Bison with white limbs are bigger. The white-limbed bison is the largest and heaviest bison in the world, with a body length of 3.3 meters and a weight of 3,000 kilograms. The most distinctive thing is that the white-limbed bison is very muscular, and it is covered with muscle blocks, just like ordinary fitness athletes. Yak's coat is short and smooth above the body, and the hair on the side, abdomen and tail is long and drooping, often close to the ground. The body length is about 250 cm and the shoulder height is about 170 cm. The whole body color is mainly dark black and brown.