Butterflies and Moths of North America

collecting and sharing data about Lepidoptera

  Sighting 1356080

Arrowhead Blue
Glaucopsyche piasus

Observation date: May 06, 2023
Submitted by: Seth Mueller
Specimen type: Photograph
Observation notes: I noticed thicker pale banding on the edge of the wings
Status: Resident
Verified by: Ken Davenport
Verified date: May 22, 2023
Coordinator notes: In the book Systematics of Western North American Butterflies in the original description of G. piasus umbrosa, starting on page 172, it mentions an intermediate population in the San Jacinto Mts. between subspecies umbrosa and sagittigera. I have no umbrosa in my collection but I have a full series of sagittigera in which females appear much like the photo you submitted-Ken Davenport
Checklist region(s): United States, California, Riverside County