Invasive Species

The endangered Woodville Karst cave crayfish (Procambarus orcinus)

Freshwater Animals Are More Fragile Than Thought, With Nearly a Quarter Threatened With Extinction, Study Finds

Species in Lake Victoria, Lake Titicaca, Sri Lanka’s Wet Zone and the Western Ghats of India are particularly vulnerable to the effects of agriculture, human infrastructure and climate change, per the paper

More than 1,300 tiny snails were released into the wild after a captive breeding effort. One baby snail is shown here on a British five pence coin.

Once Feared Extinct, 1,329 Pea-Sized Snails Have Been Released on an Atlantic Island After Captive Breeding Effort

Goats, rodents and habitat loss threatened the snails on Deserta Grande Island, so the mollusks were reintroduced on a neighboring island that’s free of invasive species

Southern sea otters are making a comeback along the coast of California—and they're chowing down on invasive European green crabs.

Hungry Sea Otters Are Taking a Bite Out of California's Invasive Crab Problem, New Study Finds

Researchers estimate southern sea otters eat up to 120,000 European green crabs per year at the Elkhorn Slough National Estuarine Research Reserve

The invasive northern giant hornet, also called a murder hornet, has been eradicated from the United States.

Officials Declare the U.S. Free of 'Murder Hornets' in a Rare Victory Against an Invasive Insect

Five years after the first sighting in Washington state, intense efforts have eradicated the bee-killing hornets from the nation

The golden mussel is an invasive freshwater bivalve recently discovered near the Port of Stockton in California. 

Invasive Mussels Recently Spotted in California Mark a First for North America

The species may have been carried to the Sacramento–San Joaquin Delta in ballast water on ships

The crowning glory of the Gardenia brighamii is its pearly flower.

Can Fungi Save This Endangered Hawaiian Tree?

By inoculating greenhouse na’u seedlings with mycorrhizal fungi, researchers hope to boost survival odds when the plants are returned to the wild

The European ant species Lasius emarginatus arrived to Manhattan around 2011 and has since become one of the most dominant ant species in the city.

Invasive 'ManhattAnts' Are Taking Over New York City and Spreading Quickly

Since appearing on Manhattan in 2011, the species has become one of the island's most dominant ants, and scientists formally identified it this year

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The Wild Story of What Happened to Pablo Escobar’s Hungry, Hungry Hippos

Ever since the demise of the infamous drug kingpin, his pet hippos have flourished, wreaking havoc on the ecosystem and terrorizing local communities

A hippo crosses a rural road near Doradal, Colombia. Experts say that left unchecked the hippo population could grow to 1,400 by 2040.

Pablo Escobar’s Abandoned Hippos Are Wreaking Havoc in the Colombian Jungle

Decades ago, the drug baron smuggled the beasts into South America for his private menagerie. They’ve been multiplying ever since. Now officials are taking extreme measures to counter the problem

ArTreeficial is a solar-powered, self-cleaning, artificial-intelligence-driven “tree” that entices the spotted lanternfly and eliminates the bug using an electronic mesh.

This High Schooler Invented an A.I.-Powered Trap That Zaps Invasive Lanternflies

Using solar power, machine learning and her family’s patio umbrella, 18-year-old Selina Zhang created a synthetic tree that lures the destructive species

Joro spiders aren't particularly bothered by the vibrations of a busy city environment.

Joro Spiders, Spreading in the Southeast, Can Survive Surprisingly Well in Cities

Unlike most spiders, the hustle and bustle of urban areas doesn’t seem to disturb the non-native Joros, a new study finds

The American mink, native to North America, is a semiaquatic mustelid that is often farmed for its fur.

Traps Scented Like Mink Butts Could Be Key to Removing the Invasive Species From the U.K.

A successful eradication trial in East Anglia has raised biologists' hopes for ridding Great Britain of the destructive creatures, which threaten native wildlife

Barred owls are bigger, faster to reproduce and less picky about food and habitat.

Can Killing One Species of Owl Help Save Another?

Biologists and conservationists are grappling with a controversial plan to kill 470,000 barred owls in the Pacific Northwest over the next 30 years

A 14-inch goldfish (Carassius auratus) pulled from the Niagara River

Giant Goldfish Are Bad News for the Great Lakes

Researchers are tracking invasive goldfish—which, often, were once kept as pets—in Lake Ontario to determine how best to manage them

Researchers at the Ohio State University collected 9,287 Asian longhorned ticks in just 90 minutes using lint rollers.

An Invasive Tick That Can Clone Itself Is Spreading Across the U.S., Threatening Livestock

Researchers documented three cows in Ohio killed by Asian longhorned ticks, which can lay up to 2,000 eggs without needing to mate

Hippos swimming close to the Magdalena River in Doradal, Colombia.

Pablo Escobar's Multiplying 'Cocaine Hippos' Will Be Sterilized in Colombia

The country’s hippo population has grown to about 170, and officials warn it could reach 1,000 individuals by 2035 if left uncontrolled

A Mediterranean fruit fly (Ceratitis capitata), also known as a medfly

Millions of Sterile Fruit Flies Will Soon Be Dropped on Los Angeles

The influx of insects is meant to combat the invasive medfly, after officials identified two of the produce-destroying creatures in the area

The Africa disappeared on Lake Huron in October 1895.

Filmmakers Stumble Upon 128-Year-Old Shipwreck in Lake Huron

A duo working on a documentary about invasive quagga mussels in the Great Lakes discovered the long-lost steamship "Africa"

Chinese mitten crabs compete with native species for habitat and food.

These Furry-Clawed Crabs Are Wreaking Havoc in the United Kingdom

Conservation officials have installed the first Chinese mitten crab trap in England, and they are asking the public to report any sightings

The yellow-legged hornet, native to Southeast Asia, has invaded other parts of Asia and Europe and feeds on insects, including honeybees.

Invasive Yellow-Legged Hornet Spotted in the U.S. for the First Time

The insect, detected in Georgia, can snatch bees from the air while hunting, posing a threat to native pollinators and agriculture

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