Insects and Spiders - native

Ponderous Borer (Trichocnemis spiculatus) on Aug 16, 2018

Submitter has sample
EDRR Status: No Response/Action Required

Description of specimen

Reddish brown beetle approximately 2 inches in length. Long antenna and large mandibles.


Hi Matthew,

Thank you for reporting this insect! Fortunately, this beetle is native and poses no harm. The ponderous borer only develops on fallen or recently killed trees and is not a threat to live trees. If you see anything else that looks suspicious, please feel free to report. Have a great week!

Kind regards,
Tyler Pedersen
Tualatin SWCD

Tyler Pedersen
Aug. 20, 2018, 10:07 a.m.