Invasive sheep are spreading and putting native bighorns at risk.

Add Yahoo as a preferred source to see more of our stories on Google. A black widow spider, a venomous species now common in the American West, wrapping up its prey. Smith Collection/Gado/Getty Images ...

In a new study, researchers used more than 5 million measurements from individual trees across much of eastern North America and showed the rate at which introduced species are spreading has increased ...

You’ve probably seen a headline or two about an invasive species taking over. Perhaps you’ve seen a sign warning of non-native plants. But have you ever wondered what those labels actually mean? Are ...

Invasive species are often looked upon with suspicion. From non-native “weeds” to insects and aquatic invaders, introduced (or non-native) species continue to be misunderstood — and consequently often ...

Sri Lanka urged people on Saturday to catch and cook invasive fish species, including the giant snakehead and piranhas, that threaten fragile freshwater ecosystems and are now banned.

There are just some things that insert themselves where they are unwanted, and when plants and animals insert themselves into areas they aren't supposed to be in it can damage an ecosystem. Tennessee ...

In the largest study of its kind, researchers at the Florida Museum of Natural History have used data from a 120-year-old program managed by the U.S. Department of Agriculture to quantify the effects ...

Climate change is already having a profound impact on cities, as global urbanization pushes more and more people to live in them. The animals who cohabitate with human, whether we appreciate their ...