Northern crescent

The Northern crescent is a small orange and black butterfly with a crescent-shaped pale mark on the underside of the hindwing. Females tend to run larger and darker than males, and the tip of each antenna is orange rather than black and white.

Caterpillars feed on asters, and females lay their eggs in clusters on the underside of host plant leaves. Most populations fly in a single brood in summer, though partial second broods occur in parts of the range.