South Africa's Rondevlei Nature Reserve has what is perhaps a new warrior in the fight against invasive species: the Hippopotamus (Hippopotamus amphibius). As reported by Yahoo! News, a pair of hippos, named Brutus and Cleo, will be joined by two other female hippos (male hippos need a harem to keep them from killing their offspring) at the reserve. The hippos, brought to the reserve by the WWF as a way of controlling non-native wetland plants, are being reintroduced to protected lands across Africa, after being nearly exterminated over the past century.
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