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One tail on hind-wing. Upper-side blue-gray with large red spot near tail. Underside of spring/fall form is dark gray, summer form is paler gray. Relatively straight post-median line is white, bordered with orange on the inside edge.
They can be found throughout the continental United States from southern Canada south to Mexico; southward to Venezuela. Their preferred habitat is open, nonforested sites; common in disturbed, weedy areas.