Adults weigh about 20 pounds, and their main prey is the snowshoe-hare --so close is the relationship that their populations boom and crash in sync, and both share similar adaptations for moving fast through snowy forest.

• 重约20磅的成年山猫和它们的主食雪兔之间的关系是那么密切，彼此数量的增加或下降是配合一致的，同时，为了生存，它们都具备在雪山密林中飞速快跑的类似的应变能力。