Invasive fist-sized Cuban treefrogs discovered in New Orleans

Officials say frogs caught at city's Audubon zoo could soon pose a threat to native frogs across the Mississippi river

Invasive, noxious Cuban treefrogs that eat smaller frogs and grow as big as a human fist have established a population in New Orleans, and officials say they could soon pose a threat to native frogs across the Mississippi river.

The US Geological Survey says frogs caught at the Audubon zoo in the city and at a nearby riverfront park are the first established population of Cuban treefrogs on the US mainland outside Florida, where they've been multiplying at least since the 1950s.