The Eurasian wolf is a widely distributed form of the gray wolf native to Europe and northern and central Asia. It is traditionally classified as the subspecies Canis lupus lupus, although wolf taxonomy varies among scientific authorities. Eurasian wolves are generally medium-to-large wolves, with size and coat characteristics varying considerably across their enormous range. Their coats commonly range through gray, brown, black, and cream tones, and they can occupy forests, mountains, tundra, steppe, and other landscapes where adequate prey and cover are available.

Eurasian wolves are highly social predators that typically live in family-based packs, using coordinated hunting, scent marking, vocalizations, and body language to communicate and maintain territories. Their diets vary geographically but commonly include deer, wild boar, elk and other ungulates, along with smaller mammals and carrion when available. Their extraordinary geographic range and ability to adapt to very different environments make the Eurasian wolf one of the most widespread forms of Canis lupus.