Butterflies and Moths of North America

collecting and sharing data about Lepidoptera

  Sighting 1411245

Acmon Blue
Plebejus acmon

Observation date: July 16, 2025
Submitted by: Luna-Linuche.76
Specimen type: Photograph
Observation notes: Several of these butterflies were feeding on flowers of beach knotweed (Polygonum paronychia) on only this one clump on an inland beach footpath. Adjacent knotweed clumps had no butterflies. Weather was warm & sunny.
Status: Resident
Verified by: davidwdroppers
Verified date: October 30, 2025
Coordinator notes: None.
Checklist region(s): United States, Washington, Clallam County