The Emerald Ash Borer is a devastating invasive buprestid beetle from Asia, whose larvae kill virtually all species of native ash trees in North America by girdling them under the bark. Adults are brilliantly metallic green and about half an inch long. Since its discovery in Michigan in 2002 it has killed tens of millions of ash trees across the continent.
Best time to see a Emerald Ash Borer
The best time to see a Emerald Ash Borer is February–June, when about 61% of U.S. sightings happen, based on 4,333 research-grade iNaturalist observations.
Not certain it is a Emerald Ash Borer? What bug is this? walks through what to check first and the lookalikes that catch people out.
Recent Emerald Ash Borer sightings near you
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