"Invasive species are a serious challenge for our parks and connected ecosystems,” the National Park Service website states.

They also are known to hunt bird eggs ... with many also holding invasive statuses. The Giant African land snail is among the worst for Florida's ecosystem because it crowds out other species ...

They are now "one of the most abundant birds in North America," said the New York Invasive Species Information. The birds "compete with native species as well as destroy crops," and are "prolific ...

Experts said there are ways to help mitigate their spread. Residents added that the lizards are not even the worst invasive species out there. The large lizards were first introduced to the ...

IWAKI, Fukushima Prefecture—A weed described as “the worst alien species on the planet ... the Environment Ministry designated alligatorweed as an invasive alien species that poses a ...

(KOIN) — The Oregon Department of Fish and Wildlife is educating the public about some of the state’s most harmful invasive species ... shellfish and birds – that clean sea water, absorb ...