This is the first Great Spangled Fritillary I've seen this season. Larvae feed on violets. Adults feed on nectar (milkweeds, thistle, Joe-pye-weed).
Great Spangled Fritillary
The Emperors were new-to-me. Both are associated with their larval food: Hackberry leaves. The Tawny is less common. They overwinter in groups as caterpillars. Adults feed on sap, carrion, rotting fruit - rarely nectar.