Insects and Spiders - native

Western Cedar Borer (Trachykele blondeli) on May 28, 2026

Originally reported as Emerald Ash Borer (Agrilus planipennis)

Submitter has sample

Description of specimen

Suspected emerald ash borer, 0.675” long. 0.25” wide. Brilliant metallic sparkle green on top and bottom, including legs and head. Brown translucent wings under shell, brown/black underneath. I will seal the specimen and keep it.

Commentary

Avatar of commenter Thanks for your report. You found a green beetle, but it isn't emerald ash borer. That is one of our common look-alikes. You found the western cedar borer, which feeds under the bark of dead/dying cedar. It is not a pest.

For other look-alikes, and to learn more about EAB and ash, visit this page:

https://oregon-eab-geo.hub.arcgis.com/pages/identify#destination2

Thanks again for your report.

Wyatt Williams
May 28, 2026, 12:21 p.m.

Resources

Western Cedar Borer information on iNaturalist and a guide to wood boring beetles in Oregon from the Oregon Department of Forestry.

Location

Dead beetle carcass in bark chips in front yard.

Expert Reviewer

Avatar of Reviewer

Wyatt Williams, Ph.D.
Wyatt Williams, Ph.D.

Invasive Species Specialist

Oregon Department of Forestry

Private Forests Division

2600 State St. Bldg. D

Salem, OR 97310-0340



Office: 503-945-7472

wyatt.williams@oregon.gov

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