Invasive Species

From cane toads to kudzu, invasive species (sometimes called alien species) are those that aren't native to an ecosystem and that cause harm to native species, local economies or humans. Invasive species can be terrestrial species, like the pythons invading Florida's Everglades, marine, like the lionfish invading Caribbean waters, or pathogens. Invasive species can cause harm by out-competing native species, or preying on them. They can sometimes increase fire risks or contribute to erosion. Some invasive species have been introduced accidentally and others, like kudzu, were introduced on purpose and then spread more widely than originally intended. Invasive species are found in every type of habitat and are typically difficult to eradicate. Read more about invasive species around the globe and efforts to stop their spread.
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T. Rex Was Likely an Invasive Species
T. rex
February 29th, 2016
Tyrannosaurus rex, king of the dinosaur age, wasn't a North American native, a new study suggests. And once the beast came onto the scene it muscled out all its competitors and took over.
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Beautiful, Rat-Filled Island Seen From Space
Australia's Adele Island
August 10th, 2015
Australia's Adele Island appears tranquil from space, but this sandy spit is the site of efforts to eradicate an invasive rat population that devastates seabird populations.
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Holy Flying Fish! Why Jumping Asian Carp Bombard Rowers
Fishermen catching Asian carp
April 14th, 2015
A throng of giant flying fish that catapulted themselves towards oncoming rowers were not coordinating a fishy assault but were probably just spooked by the boat, science suggests.
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95 Burmese Pythons (and Counting) Captured in Everglades
Burmese python
February 11th, 2016
The Burmese python has worn out its welcome, and its time is nigh.
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Snake in the Grass! Huge Everglades Python Shows Invasive Issue
The giant python.
July 31st, 2015
A giant python, about as long as a shipping container, was captured in Everglades National Park in Florida earlier this month (July 9).
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3,000 Goldfish! Dumped Aquarium Pets Multiply in Lake
Thousands of goldfish showed up in Teller Lake #5 this March.
April 9th, 2015
They multiply like … fish! Apparently, a handful of goldfish dumped into a lake in Boulder, Colorado, just three years ago have reproduced and now number in the thousands.
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Killer Shrimp Could Invade the Great Lakes
killer shrimp
February 7th, 2015
Killer shrimp, creatures that indiscriminately slay other animals without eating them, may soon join the list of invasive species living in the Great Lakes, a new study finds.
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King Crabs Arrive in Antarctic, with Claws Out for Biodiversity
A king crab.
September 30th, 2015
The king crab could soon take over a whole new kingdom, and it has global warming to thank for the conquest.
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Alien-Like Worm Invades US
The New Guinea flatworm uses its pharynx (white) to ingest soft tissues from a Mediterranean snail.
June 23rd, 2015
The New Guinea flatworm, one of the worst invasive species on Earth, has appeared for the first time in the U.S. — in Miami-Dade County, Florida. The worm uses a mouth protruding from its belly to suck soft tissues from snails.
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In Photos: Thousands of Goldfish Swarm in Colorado Lake
Thousands of koi goldfish showed up in Teller Lake #5 this March.
April 9th, 2015
Thousands of goldfish were spotted in March in Teller Lake #5 off Arapahoe Road in Boulder, Colorado, and biologists are concerned. Here's a look at the fish-filled lake.
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