The silvery blue butterfly (Glaucopsyche lygdamus) is a member of the Lycaenidae family.
The side view picture shows black dots encircled by white, the key identification pattern. It has no tail.
The Spring Azure looks similar, however it also has an additional dark pattern or spots along the borders of the wings.
The top view of the butterfly, below, shows dark blue wings with a white border. This is a female. The top side of the male silvery blue's wings show a lighter shade of blue surrounded by a dark border.
