These tiny butterflies (wingspan of only an inch) are one of our smaller species of “blues”. While the tail is small and hard to see, the Western Tailed-Blue is the only blue butterfly in the west with a “tail”. Adults can be found from late May into mid July from Alaska south through western North America — all the way down to northern Baja California. 

Size: Wing Span 7/8 – 1 1/8 inches (2.2 – 2.9 cm)

Photo by: Glenn Marangelo on 5/29/22 near Stevensville, MT