Wingspan: 26–32 mm
Flight period: in one or two generations from May to August
Larval host plants: true kidney-vetch (Anthyllis vulneraria)
Turquoise blue butterfly (Polyommatus dorylas or Plebicula dorylas) is a medium-sized blue butterfly, which is recognized by its coloration and the pattern on the underside of the wings. For this species, a white band along the outer edge of the underside of the wings is characteristic, extending to a row of oval orange spots (these are larger and more pronounced in the female than in the male). The female has on the underside of the forewings a row of large black spots, white-edged, which touch the orange spots on the inner side of the wings. In the male these black spots are smaller and somewhat farther from the blurred orange spots. For both sexes, a large white spot between the row of black and orange spots on the underside of the hindwings is characteristic.
The male's upperside of the wings is a uniform bright blue with a metallic sheen and a narrow black band along the wing margin. This black area extends slightly along the veins toward the inner parts of the wings. The female is dark brown on top with a row of orange spots along the outer edge of the wings, which on the hindwings extends to three-quarters, and on the forewings to half the length of the wing margin.
The turquoise blue flies over flowering meadows and shrub-covered slopes from the sea to high mountains, where it is found on grassy slopes in sheltered parts of valleys.
