Insects and Spiders - native

Pine Sawyer, Monochamus obtusus on Feb 5, 2026

Originally reported as Asian Longhorned Beetle (Anoplophora glabripennis)

Submitter does not have a specimen

Description of specimen

We have photos, there are so many that on a single day I killed at least 40 or 50 that had just been landing on me. Black, spots. long with the horns.

Commentary

Avatar of commenter Thanks for your report. This is not Asian longhorn beetle. This looks to be a native pine sawyer beetle. They are not considered a timber pest as they only attack trees that are freshly killed by fire, other bark beetles, or drought. They do not attack dry, finished wood.

https://www.oregon.gov/odf/Documents/forestbenefits/Woodboringbeetles.pdf

Wyatt Williams
Feb. 5, 2026, 3:12 p.m.

Location

We have about 5 acres at 26348 Rocky Point Road. We have a terrible asian longhorn beetle infestation, last summer we had to cut down 23 trees that had died rapidly over the last couple of years. It needs to be treated, the infestation is horrible.

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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