The Hickory Hairstreak (Satyrium caryaevorum) is a butterfly of the Lycaenidae family. It is found in eastern North America, from southern New England west to Minnesota and Iowa, south in the Appalachian Mountains to eastern Tennessee.The wingspan is 22–28 mm. The hindwing has one tail. The underside is light brown with broad, offset, white postmedian dashes. The hindwings have a blue tail-spot and a black-capped orange eyespot. Adults are on wing from June to August in one generation per year.