Insects and Spiders - invasive

Pigeon Horntail (Tremex columba) on Jul 27, 2025

Submitter does not have a specimen

Description of specimen

Horntailwasp?

Commentary

Avatar of commenter Thank you for your report! This is pigeon tremex (Tremex columba). It is an invasive species, but it is already well-established in Oregon and it is a secondary pest, not a tree killer. They infest dead hardwoods.

Tom Valente
July 28, 2025, 10:24 a.m.

Resources

Pigeon Horntail information from iNaturalist

Location

Seen at the Our Happy Block neighborhood garden.

Expert Reviewer

Avatar of Reviewer

Tom Valente
Oregon Department of Agriculture

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