Invasive Species

The fire ant has spread like wildfire around the world, thanks to a winning combination of traits and a little help from humans.

How Humans Helped Ants Invade the World

Waves of globalization brought these warriors to new shores, where certain species spread like wildfire

Pyrosoma atlanticum floating off of Santa Cruz Island.

Hordes of Gelatinous “Sea Pickles” Are Invading the West Coast

Usually a rare creature, no one yet knows the reason for the influx of the light-emitting creatures

Today the desert tortoise faces a variety of new human-associated threats: off-road vehicle use, the illegal pet trade, and now, an influx of deadly ravens.

To Save Desert Tortoises, Make Conservation a Real-Life Video Game

Traditional techniques weren't working for the raven-ravaged reptile. So researchers got creative

Every cupful of pond water is swirling with DNA sequences. Now, scientists are putting them to work to solve stubborn conservation mysteries.

How Scientists Use Teeny Bits of Leftover DNA to Solve Wildlife Mysteries

Environmental DNA helps biologists track rare, elusive species. It could usher in a revolution for conservation biology

Equus first evolved in North America millions of years ago.

How the Mustang, the Symbol of the Frontier, Became a Nuisance

A mainstay of Western culture, the free-roaming stallions are now a force to be reckoned with

Among all those poppies is something less beautiful—noxious, invasive weeds.

After Intense Downpour, Superblooming California Has a Problem

In a word: weeds

Prince Charles Will Battle Squirrels Using Contraceptives and a Lot of Nutella

North American gray squirrels are decimating native red squirrels in the British Isles, leading to a new plan to reduce the population of invasive mammals

The Javan myna is critically endangered in its natural Indonesian habitat, but exploding populations in Singapore have made it a nuisance there.

How Escaped Exotic Pet Birds Could Help Save Threatened Species

Though usually seen as a threat to local populations, these escapees could also help in the recovery of creatures in trouble

How Yellowstone Scientists Really Combat Invasive Species

Yellowstone cutthroat trout are on the brink of extinction as invasive lake trout continue to eat them

Researchers fear that these normal monk seal encounters could soon grow deadly.

Why Rare Hawaiian Monk Seals Are Lining Up to Get Their Shots

Fearing devastating disease, researchers are vaccinating a wild marine mammal for the first time

In the past few weeks, thousands of fish have gone belly-up.

The Massive Yellowstone Fish Die-Off: A Glimpse Into Our Climate Future?

This unprecedented kill reveals why we need to keep rivers resilient

We're gonna need a bigger tank.

Ginormous Goldfish Are Invading Australian Rivers

Abandoned by their owners, the fish run rampant and impact the environment

An Insect Could Make Ash Baseball Bats a Thing of the Past

The invasive emerald ash borer is threatening the forests where Rawlings and Louisville Sluggers come from, putting the bats in jeopardy

EU Releases Its First Invasive Species Blacklist

Gray squirrels, raccoons and crayfish were among the prohibited species

What's the Difference Between Invasive and Nonnative Species? Plus, More Questions From Our Readers

You asked, we answered

Venomous Lionfish Invade the Mediterranean

A recent survey shows that the fish have colonized Cyprus and may continue to spread

Invasive kudzu girdles a forest.

The Global Price of Invasive Species

The U.S. and China pose the greatest threat as exporters of invasive species, but other countries have more to lose

Nile Crocodiles Have Moved to Florida

Three "unusual" crocodilians turned out to be more closely related to South African crocs than American ones

Brawny American Lobsters Are Muscling in on Their European Cousins

Sweden wants to ban live American lobsters for fear they will out-claw their own

Argentine ants

Invasive Ants Could Be Beaten Back With a Targeted Virus

The idea is sound, but work needs to be done to ensure the virus doesn’t take out other insects as well

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