Any of many butterflies, of the subfamily Theclinae, that have hairlike projections on the back wings.

plural of hairstreak

plural of black hairstreak

plural of brown hairstreak

A brown butterfly, Satyrium pruni, of the family Lycaenidae

A brown and orange butterfly, Thecla betulae, of the family Lycaenidae.

A small, green butterfly, Callophrys rubi, of the family Lycaenidae.

plural of green hairstreak

A small, brown (female) or purple (male) butterfly, Quercusia quercus, syn. Neozephyrus quercus, of the family Lycaenidae

plural of purple hairstreak