Green Hairstreak

Laguna de La Mata, Torrevieja, España (2012).
Family Lycaenidae. Callophrys rubi has a wingspan reaching about 26–30 millimetres. The upperside of the wings is a uniform dull brown with two paler patches on the male's forewings made up of scent scales. The undersides are a bright green with a thin white line, often reduced to a faint row of dots or even missing altogether. The iridescent green colour of the undersides is a structural colour caused by diffraction and interference of light by microscopic repeating structures in the wing scales. The caterpillars are green with yellow markings along the back. Like other members of the family they are rather sluglike.
Habitat: It is present in wetlands as well as on poor dry meadows, at an elevation of about 0–2,300 metres.