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.
Air so cold it makes your nose hair crackle could be a good thing for the country's nearly one billion ash trees, killing off emerald ash borer larvae.
When cane toads were released in Australia in 1935, they were the latest innovation in pest control, backed by a level of consensus support that a scientist could only dream of. So what went wrong?
Gardeners may love earthworms, but in forests near the Great Lakes, the creatures are alien invaders that change soils and destroy the forest understory.
The Google Street View image-data regarding the presence or absence of caterpillar nests from an invasive moth, finding it was as accurate as field-collected data 96 percent of the time.
Sea lampreys use a digestive enzyme called a bile salt as a sexual pheromone, excreting it through their gills after not eating for weeks.
The Magellanic woodpecker has few if any known predators, but researchers now present evidence that an invasive mink species has now become a threat to the bird's population.
Although we'll never know, it seems likely that invasive insects would be happy about the the government shutdown, since it hampers efforts to eradicate them.
The relentless scourge of lionfish has crept to unexpected depths, and they are huge, reaching some 16 inches long. Even worse? Bigger females produce more offspring.
The eye-catching red lionfish is eating its way through Caribbean reefs, and nothing, not even a toothy shark, seems able to stop the voracious fish, a new study finds.