When selecting black voles, pay attention to selecting black voles with a body length of no more than 150mm and a very short tail, usually 1/3 or 1/4 of the body length. The soles of the hind feet are only covered with hair near the heels, the rest are bare, and the pads are clearly visible.

Black voles are fluffy. The snout is short and blunt, and the ear shells are short. Feet and limbs are short, no cheek pouches. The skull is thick and solid, and the molars are generally divided into many lobes.