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It is the largest of Old World grey wolves, averaging 39 kg (86 lb) in Europe; however, exceptionally large individuals have weighed between 69–79 kg (152–174 lb), though this varies according to region. Its fur is relatively short and coarse, and is generally of a tawny colour, with white on the throat that barely extends to the cheeks. Melanists, albinos and erythrists are rare, and mostly the result of wolf-dog hybridisation. The howl of the Eurasian wolf is much more protracted and melodious than that of North American grey wolf subspecies, whose howls are louder and have a stronger emphasis on the first syllable. The two are, however, mutually intelligible, as North American wolves have been recorded to respond to European-style howls made by biologists.

Many Eurasian wolf populations are forced to subsist largely on livestock and garbage in areas with dense human activity, though wild ungulates such as moose, red deer, roe deer and wild boar are still the most important food sources in Russia and the more mountainous regions of Eastern Europe. Other prey species include reindeer, argali, mouflon, wisent, saiga, ibex, chamois, wild goats, fallow deer and musk deer.
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Wolf distribution
The recovery of European wolf populations began after the 1950s, when traditional pastoral and rural economies declined and thus removed the need to heavily persecute wolves. By the 1980s, small and isolated wolf populations expanded in the wake of decreased human density in rural areas and the recovery of wild prey populations.

The gray wolf has been fully protected in Italy since 1976, and now holds a population of over 1,269–1,800. Italian wolves entered France’s Mercantour National Park in 1993, and at least fifty wolves were discovered in the western Alps in 2000. By 2013 the 250 wolves in the Western Alps imposed a significant burden on traditional sheep and goat husbandry with a loss of over 5,000 animals in 2012. There are approximately 2,000 wolves inhabiting the Iberian Peninsula, of which 150 reside in northeastern Portugal. In Spain, the species occurs in Galicia, Leon, and Asturias. Although hundreds of Iberian wolves are illegally killed annually, the population has expanded south across the river Duero and east to the Asturias and Pyrenees Mountains.

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