The Gray Hairstreak, also called the common hairstreak, is the most widely distributed of the hairstreaks. The caterpillar is commonly known as the "cotton square borer" and is known to damage bean, hops, and cotton crops.Eggs are pale green. Larvae are grass-green with white diagonal stripes on the sides.Gray hairstreaks are smallish, having a wingspan of 7/8 to 1-3/8 inch. The upper wing surface is slate gray with a patch of orange on the hind wing near its tail. The hind wing on the underside also has a couple splashes of orange near the tail, and otherwise is gray with rows of black dashes and dots having white shadows.