The long-tailed weasel is a carnivore. It has a very high rate of metabolism and eats about 40% of its body weight every day! Most of its diet is made up of small mammals like mice, voles, rabbits, gophers and chipmunks. It will occasionally eat birds and insects. It crushes its prey's skull with its canines. It uses scent and sound to track its prey. Its long, thin body makes it easy for it to follow prey into burrows.