Insects and Spiders - native

Western boxelder bug, Boisea rubrolineata on May 8, 2025

Submitter does not have a specimen

Description of specimen

Black and red beetles. There are hundreds of them all over the property. They take over the cars climb inside cars. I park and my car is stormed with them.

Commentary

Thank you for your report! Can you add a picture?

Tom Valente
May 12, 2025, 1:29 a.m.

Thanks! Those aren't beetles, they are the native Western boxelder bug, Boisea rubrolineata. They are more of a nuisance than a pest. They feed on seeds, mostly on maples and boxelder. The adults are coming out of hibernation right now. They will disperse but in the fall they look for sheltered places to overwinter, so they may be back later.

Tom Valente
May 28, 2025, 8:43 a.m.

Location

7315 SW Beaverton Hillsdale Hwy

Expert Reviewer

Tom Valente
Oregon Department of Agriculture

© 2025 Portland State University | Contact us for questions regarding site content