Ordinarily, invasive and exotic species are a grave threat to native wildlife: outcompeting local species, introducing parasites and disease, and disturbing local ecological regimes. A unique case in the Brazilian Pantanal, however, has turned the tables; here, an introduced mammal has actually aided the conservation of native wildlife. The impact of feral pigs (Sus scrofa) is a serious threat to biodiversity in many ecosystems around the globe. Their destructive rooting behavior and voracious appetite are often severely damaging to populations of plants and small animals, not to mention they serve as a reservoir for a host of zoonotic diseases. In the Pantanal, however, introduced feral pigs have had a positive impact on wildlife communities and the local culture. The Pantanal region of South America, which extends beyond Brazil into Bolivia and Paraguay, is one of the largest freshwater wetlands on the planet and boasts a diversity of unique wildlife- but this hasn't always been the case.
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