Invasive Species

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

On August 10, homes, buildings and the harbor in Lahaina are burned to the ground after wildfires swept through Maui.

How Swaths of Invasive Grass Made Maui's Fires So Devastating

Scientists have long warned that Hawaii's cover of nonnative shrubs is kindling waiting to burn

A sea lamprey

Bloodsucking Sea Lampreys Made a Comeback in the Great Lakes During Covid

Travel restrictions hindered population control of the invasive parasites, which feed on fish like trout, whitefish, perch and sturgeon

Honeybees, which are not native to the United States, may be outcompeting native bees for pollen.

Pollination From Honeybees Could Make Plants Less Fit to Survive and Reproduce

Plants visited by honeybees rather than native bees may become more inbred, a new study suggests

Australian spotted jellyfish typically reach up to 18 to 20 inches in diameter.

Invasive Australian Spotted Jellyfish Washes Up on Texas Beach

The prolific jellies can form huge swarms and clear zooplankton from wide areas of water, sending ripple effects up the food chain

A bandicoot uses its nose to sniff out subterranean insects, leaving behind shallow holes known as “snout pokes.”

The Unlikely Survival Story of Australia's Bandicoots

The defenseless marsupial was nearly wiped out by invasive species. Now rescuers are pinning hopes on a remnant island population

A giant African land snail

Giant Snails Take Over Part of Florida—Again

Officials issued a quarantine to control the invasive species, which devours vegetation, damages structures and can carry a parasite dangerous to humans

Representative Robert F. Broussard believed hippos imported from Africa would rid Louisiana and Florida of the water hyacinths smothering their waterways.

How the U.S. Almost Became a Nation of Hippo Ranchers

In 1910, a failed House bill sought to increase the availability of low-cost meat by importing hippopotamuses that would be killed to make "lake cow bacon"

Silver carp throw themselves into the air at the sound of passing boats.

Seven Wild Ways Scientists Are Trying to Stop Invasive Carp

Researchers and local officials are using unusual methods to keep invasive carp from intruding into the Great Lakes and other waterways

Huge quantities of plastics make their way into oceans and other bodies of water.

The Pacific Garbage Patch Is Home to Coastal Species—in the Middle of the Ocean

These out-of-place organisms are thriving on floating trash, but they may compete with open-water species

The critically endangered ‘akē‘akē (the Hawaiian name for the band-rumped storm petrel) is one of the species that could benefit from rat-free habitat on Lehua Island, Hawai‘i.

This Tiny Hawaiian Island Is Free of Invasive Rats

Now scientists are trying to coax back lost seabird colonies

Yellow crazy ants (Anoplolepis gracilipes)

These Male Ants Have Two Separate Sets of DNA

A genetic condition called chimerism may have helped yellow crazy ants become a dominating invasive species, a new study suggests

Black widows are the most venomous spider in North America, with venom about 15 times as potent as a rattlesnake's.

Black Widow Spiders Are Being Killed Off by Non-Native Brown Widows

Despite their reputation as fearsome predators, black widows are on the defensive due to attacks by their cousins, a study shows

Marion Island is home to a quarter of all wandering albatrosses in the world.

The Ambitious Plan to Stop Mice From Eating Seabirds

Conservationists want to clear Marion Island of the pests, which are wreaking havoc on albatross and other nesting species

Wild pigs have been in the southern United States for hundreds of years.

Destructive 'Super Pigs' From Canada Threaten the Northern U.S.

The animals root through crops, prey on native species, cause soil erosion and carry pathogens that can spread to humans

Steps lead to one of the pools that Louise du Pont Crowninshield had built among the remains of the former powder mill.

An Abandoned, Industrial Ruin Bursts With New Life in Delaware

Thanks to a few horticulturalists with an eye for history, a garden lost to time peeks out from the creeping vines

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