Love is literally in the air.

On our trip to Great Mountain Forest, I saw these Pearl Crescents (Phyciodes tharos). This is one of the most common species of Nymphalidae in eastern North America. You can find them on the wing throughout the warm season (late spring through early fall), and larvae can be found eating a wide variety of aster plants. This probably explains why you will most commonly find adults in fields and weedy areas along roads and other disturbed or early successional habitats.
The mating pair that I saw in this picture was actually flying together (until I caught them in my net!). When they are coupled like this, the female is the one who powers flight, and the male is just along for the ride.