The adult butterfly has a wingspan of 5–7.5 cm (2–3 in). Its flight period is from May to September. "The silver mark on the underside of the hindwing is broken into two parts, a curved line and a dot, creating a ? shaped mark that gives the species its common name." females lay eggs singly or stacked under non-host leaves, caterpillars must search for host, hibernates as adult, some stay in north, others migrate south, males perch to locate females and puddles.
City parks, fence rows, suburbs, wooded areas with some open space.
Caterpillars feed on members of the elm family,hackberry, and members of the nettle family. Adult butterflies prefer carrion, dung, rotting fruit, and tree sap.