Butterflies and Moths of North America

collecting and sharing data about Lepidoptera

  Sighting 1250944

Chryxus Arctic
Oeneis chryxus

Observation date: May 31, 2020
Submitted by: dbrudin
Specimen type: Photograph
Observation notes: None.
Status: Resident
Verified by: mikefisher
Verified date: September 02, 2020
Coordinator notes: Correct ID....O. chryxus flies only in even years in Colorado. At higher altitude (10,000 ft. to and above timberline) is a sibling species that looks much like chryxus. This is Oeneis calais (they don't have it listed on the BAMONA site). It flies in both even and odd years. Both species overlap in even years at around the 10000 ft. level. The underside is darker on calais than on the one in your photo. Mike
Checklist region(s): United States, Colorado, Teller County