Insects and Spiders - native

California Prionus Beetle (Prionus californicus) on Aug 2, 2022

Submitter has sample

Description of specimen

Large beetle. Brown/black. Approximately 2 inches in length. Large serrated antennae.

Commentary

Thank you for your report! Yes, this is the native California root-borer, Prionus californicus. They are not tree killers. Their grubs live mainly in decomposing stumps.

Tom Valente
Aug. 2, 2022, 9:17 a.m.

Location

Front porch of our home. Was drawn to the lights through the windows at night. Our property has several large trees original to the home from 1914, a large garden, native flower beds and a 20 tree orchard. We are surrounded by mainly grass fields. Located less than 1/4 mile from the Willamette river. We found one of these nettles last year on our front porch as well.

Expert Reviewer

Tom Valente
Oregon Department of Agriculture

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