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Wolf or Gray ordinary form predatory mammals from the family canids. Along with the coyote and the jackal is a small genus of wolf. Furthermore as the results of studying the sequence of the DNA and genetic drift a direct ancestor of the domestic dog which is usually regarded as subspecies. One of the largest living animals in his family his body length can be up to 160 cm tail length 52 cm height at the withers 90 cm body weight may be up to 80 kg.

Once the wolf was much more widespread in Eurasia and North America. Nowadays its area and the total number of animals has greatly decreased mainly as a result of human activity changes the natural landscape urbanization and mass extermination. In many parts of the world is on the verge of extinction although in the north of Eurasia and America its population still remains stable. Despite the fact that the population continues to decline it is still in many places is hunted like a potential danger to humans and livestock or for fun.

As one of the key predators wolves play a very important role in the balance of ecosystems such biomes like forests of temperate latitudes taiga tundra steppes and mountain ranges. Total emit about 32 subspecies of the wolf which differ in size and fur shades. On the territory of the Russian Federation are the most common ordinary and tundra wolves.

The most likely ancestor of the wolf is considered Canis lepophagus a fine representative of the canine with a narrow turtles living in the Miocene of North America and possibly also a former ancestor coyote. After the extinction of borophagus a large kind of canine C. The lepophagus increased body size and width of the skull. Fossils of this species have been found in northern Texas may belong to the representative of the ancestors of all modern wolves. The first real wolves are beginning to emerge in the early Pleistocene about 1.8 million years ago. Among them was Canis priscolatrans a small look of a modern red colonized Eurasia via the Bering Strait. New population of Eurasian C. priscolatrans gradually evolved S. mosbachensis which has a close resemblance to modern wolves. It was common in Europe since the beginning of the Quaternary glaciation until about 500,000 years ago and subsequently evolved into Canis of lupus .

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