Cyanophrys herodotus, the Tropical Green Hairstreak or Tropical Greenstreak, is a butterfly of the Lycaenidae family. It was described by Fabricius in 1793. It is found in Mexico, Guatemala, Panama, Nicaragua, Colombia, Ecuador, Peru, Bolivia, Brazil, Paraguay and Argentina. Rare strays can be found as far north as southern Texas. The habitat consists of open disturbed areas in tropical and subtropical rainforests and cloudforests at altitudes ranging from 600 to about 2,000 meters.