Insects and Spiders - native

Banded Alder Borer (Rosalia funebris) on Jul 1, 2025

Originally reported as Longhorn Beetles (Cerambycidae)

Submitter does not have a specimen

Description of specimen

It appears to be a Citrus Longhorn Beetle based on site identification alone - cannot be sure as we could not capture the physical specimen.

Commentary

Thank you for your report! Yes, there are many native longhorn beetle species that are not pests. This one is the native Banded alder borer, Rosalia funebris. Not a tree killer, they breed in dead branches of maple and red alder. Thanks for being on the lookout!

Tom Valente
July 3, 2025, 1:48 a.m.

Resources

Information from Banded Alder Borer from Oregon State and iNaturalist.

Location

The Citrus Long-Horned Beetle was found on the glass window of the Sutton luxury apartments steps from the Willamette River. We assume a cargo ship from Asia may have transported the species. The exact GPS location was 45.5350386, -122.6819511

Expert Reviewer

Tom Valente
Oregon Department of Agriculture

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