The Asian needle ant is a stealthy and dangerous invasive species spreading across the U.S., with a painful sting that can cause severe allergic reactions.

Asian needle ants are spreading quickly. Learn what makes their sting dangerous and how these ants can displace native species.

A new study found that over a quarter of the world's naturalized plant species are threatened in parts of their native range -- raising questions about the role non-native populations may play in ...

When a plant species spreads beyond its habitat, it is usually seen as a threat to native flora and fauna. But what happens ...

English ivy may look nice and bucolic, but in the U.S., it can be an extremely annoying and invasive vine. A dedicated group ...

Since the discovery of the mountain gorilla subspecies in 1902, its population has endured years of war, hunting, habitat destruction, and disease—threats so severe that it was once thought the ...