The native red squirrel population in the UK has been decimated by the encroachment of its American cousin, an invasive species. Could a "gene drive" help?

The Callery pear was meant to help prevent fire blight from destroying the commercial pear industry. Then it became invasive.

eDNA is DNA that an animal sloughs off into its environment through feces, shedding, or lost skin. The technology can detect invasive species.

Most people treat animals as tools for improving human lives. But recent reports reveal (mis)treatment of animals is harming the planet as a whole.

According to birding lore, two of America's most invasive bird species were introduced by a misguided Shakespeare fan named Eugene Schieffelin.

Are invasive species always bad? Maybe they aren’t, according to an increasingly common point of view among ecologists.

Mute swans are the poster child for a harmful species protected by strong public goodwill.