Insects and Spiders - native

Banded Alder Borer (Rosalia funebris) on Jul 25, 2026

Description of specimen

Submitter does not have a specimen

Black and white wings and antennae with turquoise body, approximately 2.5" body length and antennae length longer than body.

Commentary

Avatar of commenter Thank you for your report! Your identification is correct. These beetles are native and not tree killers. Their grubs feed in dead branches of forest trees.

Tom Valente
Aug. 5, 2026, 8:30 a.m.

Resources

Information from Banded Alder Borer from Oregon State and iNaturalist.

Location

On our driveway at 8301 SW Canyon Lane Portland OR 97225 July 18th, 2:14 pm.

Expert Reviewer

Avatar of Reviewer

Tom Valente
Oregon Department of Agriculture

Maintained by Oregon State University | Contact us for questions regarding site content