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.
A snake in France had a lucky escape after attempting to eat a fish with a spiny dorsal fin that had gotten lodged into the reptile's esophagus.
History is peppered with times when our patchy knowledge of natural systems has led to questionable interventions with unintended — and sometimes disastrous — consequences.
The 1992 storm destroyed a python breeding facility, potentially setting hundreds of pythons free. But it's likely the invasive species had gained a foothold in the Everglades long before the hurricane hit.
The invasive fish, known as a pacu, originates from South America and has evolved human-like gnashers to accommodate its varied diet.
Invasive pythons across the state are about to start laying their eggs after spring's mating season, with the 16-foot (5 meter) female caught being no exception.
With colors ranging from candy pinks to golds and sometimes possessing wingspans as big as a bird's, moths are a fascinating group. Ecologist Tim Blackburn tells Live Science about the incredible, hidden world of moths.
A new census of the world’s largest invasive species reveals the population is roughly double the size scientists previously estimated.
The invasion of pythons has had little to no impact on cotton rats, explaining why some areas are now increasingly dominated by rodents.
Nutria, also known as coypu or swamp rats, are large rodents that wreak havoc on their non-native ecosystems.
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