There is one generation per year with adults on wing from late June to August. They nectar at deep-throated, light-colored flowers such as phlox (Phlox species) or milkweed (Asclepias species).
Each year, there is a single generation of butterflies that emerge between late June and August. They feed on nectar from deep-throated, light-colored flowers such as phlox or milkweed.