Polyommatus escheri - Escher's Blue - Groot tragant blauwtje - Escher Bläuling
The upperside of the male is bright blue with black borders and white fringes. The female is chocolate brown with white fringes and at the base sometimes a blue dusting. On each wing there is set of orange submarginal lunules; on the forewing it's reduced. The undersides are grey (male) and brown (female) with a blue dusting at the base of the hindwing. The white-edged blackspotes are heavy and the orange lunules are usually present on both wings. There is no black spote in the cell of the forewing. Flight from May to August in one brood in flower rich grassland from sealevel to 2000m. The larval foodplants are milk-vetches and sainfoins.