谁可以给我一点英文资料，关于动物的，最好是稀有的

Wolf (animal), carnivore related to the jackal and domestic dog. All wolves are characterized by powerful teeth, bushy tails, and round pupils. Certain characteristics of the skull distinguish them from domestic dogs, some breeds of which they otherwise resemble.

There are two species of wolves: the gray, or timber, wolf, once widely distributed but now found only in Canada, Alaska, and northern Europe and Russia, except for a few isolated packs in other regions; and the red wolf, found only in Texas and the southeastern United States.

An adult gray wolf measures up to 2 m (6.5 ft) in length, including the tail (less than half the body length), and weighs up to 80 kg (175 lb). The fur of the gray wolf is red-yellow or yellow-gray with black patches on its back and sides, and white on its chest and abdomen. There are also black or brown gray wolves, and those in the far north may be pure white. The red wolf is smaller in size and usually darker in color.