People around a Colombian town have grown accustomed to living near the hippopotamuses descended from a few imported illegally from Africa in the 1980s.
Álvaro Molina has had his run-ins with the burly bunch of neighbors with disreputable contacts who showed up about a decade ago along the river in front of his house in Colombia’s Antioquia province. But he’s learned to live with them and says he is worried about a government plan he fears could harm them.…