It's a bad day to be a beaver the Argentine province of Tierra del Fuego - 100,000 of the animals are set to be culled in a hope to eradicate the species.
The North American beaver has wreaked havoc since its introduction in 1946. Fifty of the rodents were brought over so locals could work in the fur trade.
In their normal habitat, beavers are hunted by bears and wolves. With no natural predators in Argentina, they quickly got out of control.
And unlike in North America, the trees in South America can't regrow once they're gnawed down by the toothy critters.
It means when the beavers build their dams they're destroying native forest, and officials say an area twice the size of Buenos Aires has been destroyed.
Beaver hunting experts will be brought in from North America and humane traps will be used to cull the animals "quickly and effectively", the National Strategy for Invasive Exotic Species' head Adrian Schiavini told local radio.
"The idea is to train a group of hunters and then choose the best from this group and put them to work in seven pilot areas on Isla Grande in Tierra del Fuego."
The eradication programme has been planned since 2008.