Ermine weasels have a brown or yellow-brown coat, with paler belly fur, and they grow white fur in the winter months. The solitary mammals are about 10 inches in length, with an additional 3-inch tail. They weigh up to 7 ounces.
The ferocious hunters eat more than 40 percent of their body weight each day, using their keen sense of smell to feed on small rodents, birds, insects, berries and carrion. They are preyed upon by owls and martens.Learn more about Pets