Probably one of the most unusual introduced species is this one. When this private zoo was abandoned by its drug lord in the early 90's most animals died out, but the hippos escaped to the nearby Magdalena river and neighboring lakes/floodplains. The population is of about 50-60 right now and only 1 is actually contained, all others roam freely and are fed in order to maintain them within a specific area + some fencing is used. This, however, is not enough and animals often are found far away from the original area where they were introduced, including nearby villages.
