Hairstreaks (Theclinae), a subfamily of the Gossamer-wing butterflies (Lycaenidae), often have a small tail at the inner edge corner of the rear wing. The most important features for determination are on the underside of the wings, especially the rear wing. On the underside is a characteristic, fine and white marking, a hairstreak. Furthermore, they are sometimes difficult to find, because they often reside above in bushes or trees.
Green Hairstreak – 2008 (NL)
The Green Hairstreak (Callophrys rubi) is a butterfly that flies in one generation from late April to mid-July. The wings are closed, except in flight, showing only the green underside with its faint white streak. The extend of this white marking is very variable. It is frequently reduced to a few white dots and may be almost absent. The upper side is dark brown and the eyes rimmed white. The wingspan is 27-34mm. Host plant: Common Rock-rose, Bird’s-foot, Corse, Broom, and Dyer’s Greenweed. Dutch name: Groentje. Frisian name: Grienjurkje.
Gold-bordered Hairstreak – 2017 (CO)
The Gold-bordered Hairstreak (Rekoa palegon) is a hairstreak that occurs in the North of South America. I spotted this butterfly in Medellin (Colombia). The underside of the wings is grey with a pattern of orange-brown irregular lines and an orange-brown outer edge. The top is brownish with a blue sheen on the inside of the wings. In the male, the blue colour is more present. This hairstreak owes its name to that orange-yellow outer edge. Host plant: Aster. Dutch name: Goudgerande page. Frisian name: –
Brown Hairstreak – 2018 (FR)
The Brown Hairstreak (Thecla betula), like the Purple Hairstreak (Favonius quercus), is often found in the tops of the trees. This hairstreak is hardly seen in the North of the Netherlands. During my holidays in France, in the Vendée, I came across this beautiful orange butterfly for the first time. The top of the wing is dark brown. The female has a large, prominent kidney-shaped orange spot on the front wing. The underside of the wings is light brown to orange with an orange band across the rear wing along the wing edge. Striking are the two white cross lines on the underside of the rear wing, the innermost of which runs from the wing edge to the middle of the wing. Between those white thin lines is a dark orange band. On the rear wing, there is a rather large, striking tail. The wingspan is 38-40mm and the flying period is in one generation from July to October. Host plant: blackthorn. Dutch name: Sleedoornpage. Frisian name: Krikelbeampaazje.