An Invasive Mosquito Threatens Catastrophe in Africa A malaria-carrying species that thrives in urban areas and resists all insecticides is causing outbreaks in places that have rarely faced the disease.
How Invasive Plants Caused the Maui Fires to Rage A sweeping series of plantation closures in Hawaii allowed highly flammable nonnative grasses to spread on idled lands, providing the fuel for huge blazes.
Rome’s Umbrella Pines Are in Danger While an invasive insect bears much of the blame for endangering a beloved symbol of Rome, critics are also pointing the finger at city government.
Worms Thriving in the Arctic The unexpected presence of earthworms in the Far North could cause rapid changes in some of the planet’s most fragile ecosystems.
Sparrows Are the Main Suspects in a Bird-Nest Murder A nest was assaulted. The main suspect: A nonnative sparrow.