"For some animals, there’s no such thing as a dog-eat-dog world. They rule.

Animals from around the world that stow away in airplanes, ships and the luggage of some smuggler become almost bulletproof when they make their way into the American wilderness as invasive species. Why? They’re new here, and they don’t have predators to keep them in check. Animals that should be afraid of a vicious predator aren’t. Invasive species eat like kings.

Living high on the hog, these marauders aren’t going anywhere. Unlike many native animals that are disappearing from North America — vaquita porpoises, monarch butterflies, bottlenose dolphin and such — invasive species are growing faster than wildlife and game officials can manage them. In many cases, authorities have given up any hope of eradicating them."

Darryl Fears reports for the Washington Post February 23, 2015. [2]