Callophrys augustinus “Brown Elfin” Lycaenidae
Glacier National Park, MT
June 20, 2014
Robert Niese
This is a pretty common butterfly here in Montana. You can easily recognize them by their Lycaenid shape and dull metallic-y brown color. These guys don’t have tails like the hairstreaks, but sometimes have a tail-like lobe on their hindwings.
Northwest Naturalist 