Butterflies and Moths of North America

collecting and sharing data about Lepidoptera

  Sighting 1426718

Chalcedon Checkerspot
Euphydryas chalcedona

Observation date: June 18, 2026
Submitted by: MAKI
Specimen type: Photograph
Observation notes: mud-puddling
Status: Resident
Verified by: Ken Davenport
Verified date: July 04, 2026
Coordinator notes: I am not sure what subspecies is in Lassen County, Crabtree's book called them "macglashani" but yours seems close to sierra, or or they intergrades between the two?-Ken Davenport
Checklist region(s): United States, California, Lassen County