Wild pigs in North America : history, distribution, ecology, and challenges
Wild pigs belonging to the species Sus scrofa are not native to the Western Hemisphere. In spite of having had a fairly stable presence in North America during most of the 20th Century, wild pigs on this continent have undergone an explosive increase in both numbers and distribution since 1990. At present these animals are established in 36 US states, four Canadian provinces and a number of Mexican states. Similar to the original introduction from the Old World, this more recent continental increase has been largely man-made. A major part of the reason for the success of this invasive species ...
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