with a license; around 1,200 wolves are harvested annually. In the contiguous United States, wolf declines were caused by the expansion of agriculture, the decimation of the wolf's main prey species like the American bison, and extermination campaigns. Wolves were given protection under the Endangered Species Act (ESA) of 1973, and have since returned to parts of their former range thanks to both natural recolonizations and reintroductions in Yellowstone and Idaho. The repopulation of wolves in Midwestern United States has been concentrated in the Great Lakes states of Minnesota, Wisconsin and Michigan where wolves number over 4,000 as of 2018. Wolves also occupy much of the northern Rocky Mountains region, with at least 1,704 wolves in Montana, Idaho and Wyoming as of 2015. They have also established populations in Washington and Oregon. In Mexico and parts of the southwestern United States, the Mexican and U.S. governments collaborated from 1977 to 1980 in capturing all Mexican wolves remaining in the wild to prevent their extinction and established captive breeding programs for reintroduction. As of 2022, the reintroduced Mexican wolf population numbers at least 241 individuals across New Mexico and Arizona, with an additional 45 across Sonora and Chihuahua. Eurasia Europe, excluding Russia, Belarus and Ukraine, has 17,000 wolves in more than 28 countries. In many countries of the European Union, the wolf is strictly protected under the 1979 Berne Convention on the Conservation of European Wildlife and Natural Habitats (AppendixII) and the 1992 Council Directive 92/43/EEC on the Conservation of Natural Habitats and of Wild Fauna and Flora (AnnexII andIV). There is extensive legal protection in many European countries, although there are national exceptions. Wolves have been persecuted in Europe for centuries, having been exterminated in Great Britain by 1684, in Ireland by 1770, in Central Europe by 1899, in France by the 1930s, and in much of Scandinavia by the early 1970s. They continued to survive in parts of Finland, Eastern Europe and Southern Europe. Since 1980, European wolves have rebounded and expanded into parts of their former range. The decline of the traditional pastoral and rural economies seems to have ended the need to exterminate the wolf in parts of Europe. As of 2016, estimates of wolf numbers include: 4,000 in the Balkans, 3,460–3,849 in the Carpathian Mountains, 1,700–2,240 in the Baltic states, 1,100–2,400 in the Italian peninsula, and around 2,500 in the northwest Iberian peninsula as of 2007.