(Scott Bauer / USDA)

The Country's Most Dangerous Beetles

Invasive beetles of various colors and sizes have infiltrated U.S. forests, despite efforts by government experts

Emerald ash borer (Agrilus planipennis)

Emerald ash borer
(Maura McCarthy)

Native to: Eastern Russia, northern China, Korea and Japan
Attacks: Ash trees of the Fraxinus genus
First discovered in the United States: Near Detroit, Michigan in summer 2002
Currently found in: Michigan, Illinois, Indiana, Ohio, Maryland, Pennsylvania, West Virginia, Wisconsin, Missouri, Virginia, Minnesota, New York and Ontario, Canada Strange symptom of infection: Increased damage by woodpeckers that eat the insect larvae

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