Butterflies and Moths of North America

collecting and sharing data about Lepidoptera

  Sighting 1402178

Acmon Blue
Plebejus acmon

Observation date: May 29, 2025
Submitted by: zencoyote
Specimen type: Photograph
Observation notes: Cluster of individuals centered around a patch of fresh Heliotrope and surrounding grasses in the wooded flood plain of a stream. Site is well inland; 30 miles from coast. No sign of Eriogonum fasciculatum in the immediate vicinity. Difficult to get ventral view of males. Weather mild, calm, low 70s.
Status: Resident
Verified by: Ken Davenport
Verified date: June 02, 2025
Coordinator notes: Your male appears to be monticola. Was there Eriogonum fasciculatum nearby? Rather than reject the record, I will accept it as an acmon, but it may actually be a monticola-Ken Davenport
Checklist region(s): United States, California, San Diego County