who interrupted Bidens speech at a recent fundraiser in Minneapolis.

have no natural predators in Colombia and have been declared an invasive species that could upset the ecosystem.Colombia on Tuesday began the sterilization of hippopotamuses.

chief of the environment office in charge of the plan.which is why the government is arranging for the possibletransfer of hipposto other countries.Experts say sterilization alone is not enough to control the growth of the invasive species.

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

they end up killing fish and threatening endemic species like manatees.

Rain events around the area have complicated efforts to capture the animals.Australia recorded its two hottest days ever.

Up to 30% of their habitat has been destroyed.Oakbank Balhannah CFS via AP Australia has been ravaged by fires since September.

Koalas are native to Australia and are one of the countrys most beloved animals.peaked at 38 C 100 F on Saturday.