Satyrium calanus, the banded hairstreak, is a butterfly in the family Lycaenidae.
The banded hairstreak is a common hairstreak east of the Rocky Mountains in North America. It is a territorial butterfly that will challenge other butterflies invading its territory.
Listed alphabetically:
Eggs are laid singly on the host plants and hatch in the spring. There is a single brood that flies early June to late August.
Host plants include oak, hickory, and walnut (especially butternut).