A composite image of a grey squirrel and a red squirrel

Can CRISPR Save Tufty Fluffytail?

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?
Callery Pear Trees in bloom

When a Cultivated Tree Goes Rogue

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

A Primer on e-DNA

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

Is Human Mistreatment of Animals Killing Our Planet?

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.
European Starlings

What If We Had All the Birds from Shakespeare in Central Park?

According to birding lore, two of America's most invasive bird species were introduced by a misguided Shakespeare fan named Eugene Schieffelin.
A young Carcinus maenas showing the common green colour

Invasive Species: Pro And Con

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

Are Mute Swans a Harmful Invasive Species?

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