Dozens of the invasive behemoths, descended from 4 imported by the 1980s drug lord, are thriving in the region around his former ranch. Colombia wants to ship some of them to Mexico and India.

Cane toads are notorious pests in Australia, colonizing habitats and poisoning other wildlife. Park rangers euthanized the 5.95-pound animal, whose body will be donated to the Queensland Museum.

William Simpson wants to deploy the wild horses across public lands, to live and graze — and ultimately, prevent the worst wildfires.

Not much is known about the invasive yellow and black East Asian spider, but some researchers have noticed fewer sightings of native spiders since the Joro arrived in North America roughly eight or nine years ago.

Georgia's wildlife agency is asking residents to report sightings of an invasive lizard that can pose a threat to native species. The Department of Natural Resources is trying to locate and remove South American tegus from Georgia before the lizards can thrive in greater numbers.

Georgia is home to a veritable rogues’ gallery of invasive critters that make the Joro spider look as harmless as a ladybug.

So far, the invasive zebra mussels species aren't known to exist in Georgia waters. But the state just had a near-miss.

The Cuban frogs first appeared in Georgia in 2004. They are raising concerns with the Department of Natural Resources because they are competing with native species for resources.

On Halloween, volunteers are invited to the “Invasion of the Plant Snatchers,” a workday at the park to teach people how to identify and remove invasive plants. It is the first public service project of the Arbor Conservation Board.

A tiny brown ant from South America has the potential to cause big problems in Georgia. Unlike other species, tawny crazy ants run erratically and very...