I believe this is a male Clodius Parnassian. Females have a shiny black torso, and males have a fuzzy creamy torso. This individual would not be still! He was so hard to photograph. He skipped from flower to flower and led me on a merry chase. I was glad I got a few shots, but wish I had been able to get some better ones.

Lost Prairie, Linn County, Oregon

44.40366, -122.07507 A small prairie long the highway Santiam Highway between Corvalis and Sisters. It was very hot and dry.

July 15, 2023

Notes:

• Host plant is Dicentra – Bleeding Heart.
• Antennae are entirely black vs Mountain Parnassian which have black and white striped antennae.
• Look for females with large white sphragis (waxy white thing deposited by males to make sure no other males can mate with her)

I have also seen P. clodius in Washington, including several females.