DORVERDEN, GERMANY – JUNE 14: A European wolf strays in its enclosure at the Wolfcenter wolf park on June 14, 2017 in Dorverden, Germany. The European wolf, known by its scientific name of Canis lupus lupus, disappeared in Germany in the 19th century but has in recent years been making a steady comeback. German wildlife authorities have recorded the presence of at least 200 wolfs in the wild across the country and believe they migrated from eastern Europe. The wolfs are under official protection, much to the irritation of shepherds, who claim the wolfs are becoming a growing menace to their sheep. (Photo by Morris MacMatzen/Getty Images)