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Offspring of hippos illegally imported to Colombia by drug kingpin Pablo Escobar are thriving in the lush area, and experts are warning of the dangers they pose.

But for a few hours a day, the 4-month-old pygmy hippo springs to life, gumming on leaves, zooming around the compound and tossing her head in a silent, open-mouthed roar.

A baby pygmy hippo named Moo Deng has become a huge internet star.

He added that the zoo's pygmy hippo house would now be closed for a month due to the first 30 days after birth being "critical" for Haggis' development.

Residents of a town in north-western Nigeria are celebrating after a rare but feared hippo - along with its calf - was killed by rice farmers and fishermen in a hunt lasting several weeks.