Grey wolves are one of the greatest success stories, according to the report. They were found in most areas of Europe at the end of the 18th century before their abundance decreased as human populations rose. They have now repopulated many regions in Europe, where numbers increased by nearly 1,800% between 1965 and 2016, according to the report. Some Scandinavian countries have even allowed culls of wolves in agricultural regions in order to protect livestock.
