Color: Upper surface of forewing cell with 3 dark gray bars. Front wing has no red spots. Upper surface of hindwing with 2 red spots; female usually has red anal bar. Mated females have large, white keeled pouch (sphragis) at end of abdomen.
Wingspan: 2 - 2 1/2 inches (50 - 62 mm)
Host plants: Bleeding heart family (Fumariaceae) including Dicentra uniflora, D. formosa, and D. pauciflora.
Overwintering stage: eggs
Mate-Location system: patrolling
Flight: June - July
Conservation: Subspecies strohbeeni from California's Santa Cruz Mountains is extinct.
NCGR: G5 - Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.
https://www.butterfliesandmoths.org/species/Parnassius-clodius