Which invader clogs water intake and delivery systems after establishing in freshwater bodies?

Larvae feeding beneath bark can girdle and kill ash trees. Which invasive insect causes this damage?

Which invasive floating plant forms dense colonies that block sunlight and crowd out native aquatic species?

Kudzu grows over trees and shrubs across the Southeast. Why do the native plants underneath a kudzu mat often die?

Which invasive submerged plant forms thick underwater mats that impede irrigation and boating while crowding out native species?

Which invasive semi-aquatic rodent damages vegetation and destroys wetland habitat?

Which invasive fish-like parasite preys on native fish in the Great Lakes?

Which invasive reef fish preys on native species and has venomous spines?

On Guam, which invasive snake causes frequent power outages by climbing on electrical wires?

Which invader can poison native predators that attempt to eat it in Australia?

Which invasive grass forms dense stands that crowd out native species in the southeastern United States?

Which twining invasive vine with bright orange-red berries can smother plants and uproot trees because of its weight?

Which invader was introduced to the Great Lakes largely through ballast water discharged from ocean-going cargo ships?

Accidental cargo imported from Asia brought which tree-killing beetle to the United States?

Which invasive snake likely reached Guam accidentally in imported cargo?

Escaped or intentionally released pets established wild populations of which invasive reptile in South Florida?

Which invasive floating plant spread after visitors took it home as an ornamental from the 1884 world's fair in New Orleans?

Which invasive vine was introduced to the United States as an ornamental and for erosion control?

Which invasive rodent was introduced for fur production before escaping or being released into the wild?

Flooding and accidental releases from aquaculture ponds allowed which group of fish into the Mississippi River system?

The aquarium trade is a documented introduction pathway for which invasive reef predator?

Which invader was deliberately released in Queensland, Australia, in 1935 to control beetles that were damaging crops?

Which invasive snake in the Everglades can grow longer than 17 feet and preys on native mammals?

On Guam, wildlife managers drop dead mice laced with acetaminophen from helicopters to kill which invasive snake?

Which invasive species spread into the upper Great Lakes through the Welland Canal?

Which invasive mussel from the Black and Caspian Sea region was first found in North America in Lake St. Clair in 1988?

Which invasive vine can grow up to about a foot a day in summer, letting it blanket trees, poles and buildings?

Which invasive grass first arrived in Alabama around 1912 as packing material in shipments from Japan?

Which semi-aquatic rodent from South America is established in marshes along the Gulf of Mexico coast, the Atlantic coast, and the Pacific Northwest?

Which invasive bird was released in New York City's Central Park and later spread across North America?

What was a major ecological consequence of brown tree snake invasion on Guam?

What documented consequence has Burmese python predation had in South Florida?

After zebra mussels establish in a lake, what documented food-web change can occur?

Within a few years of emerald ash borer infestation, what happens to an ash tree?

What happens to the water beneath dense mats of water hyacinth?

What was the effect of sea lampreys on the Great Lakes fishery before control efforts?

What documented economic consequence is associated with European starlings in the United States?

What ecological consequence can invasive carp cause in the Mississippi River system?

Cane toads were released in Australia to control beetles in sugarcane fields. What was the result?

Nutria often eat marsh plants down to the roots. What can happen to the marsh afterward?