Butterflies and Moths of North America

collecting and sharing data about Lepidoptera

  Sighting 1382810

Rocky Mountain Dotted-Blue
Euphilotes ancilla

Observation date: June 15, 2024
Submitted by: taogirl
Specimen type: Photograph
Observation notes: This was observed on a loop trail above Black Canyon in CO at Lat/Lon: 38.5767, -107.7208. It was sunny and warm, in 80s. I think the plant is a sulfur buckwheat.
Status: Resident
Verified by: mikefisher
Verified date: July 04, 2024
Coordinator notes: Should be an easy identification for you...it is not the Lupine Blue but the Ancilla (or RM) Dotted-blue. Two primary characters...1) black checks in the wing fringe, especially on the forewings and 2) no metallic (reflective) green-blue scales assoicated with the black spots along the edge of the ventral side of the hindwings. Mike
Checklist region(s): United States, Colorado, Montrose County