Observation notes: Sunny, warm day. The butterfly was visiting Sulphur Flower. I have no photos of top.
Verified by: A_baldini
Verified date: June 06, 2020
Coordinator notes: This is actually the Rocky Mountain Dotted-Blue, Euphilotes ancilla. The Lupine Blue is very similar, but has a row of blue scintillant spots on the ventral hindwing (these spots are plain black in E. ancilla). Both use the same host (and primary nectar) plant, sulphurflower buckwheat.