co/lirNZotdNn NWS Chicago (@NWSChicago) July 13

said in a video distributed to the press.which spread from Escobars estate into nearby rivers where they flourished.

The plan includes sterilizing 40 hippos each year.which then poisons the rivers.descendants of animals illegally brought to the country by late drug kingpin Pablo Escobar in the 1980s.

have no natural predators in Colombia and have been declared an invasive species that could upset the ecosystem.the population is booming an its affecting the local ecosystem.

Because they are such large animals.

Colombia on Tuesday began the sterilization of hippopotamuses.who is believed to have been Wilson.

for custody of the four siblings.The youngsters survived by eating fruit and a bag of cassava flour.

picked up the kids scent and led the rescue team to their location.quite emaciated and without much to eat out there in the jungle.