Escher's Blue (Polyommatus escheri)

Male. Taken in the Vercors NP, France, on July 24th 2018.
(1/400th sec at f14. Approx 3x lifesize. © David Hastings)


Wing span: 34 - 38mm

The male Escher's Blue has sky-blue upper surfaces with a thin white stripe along the forewing costa. The female's uppersides are brown with orange lunules. The hindwing underside has bold white-bordered black ocelli.

It is found in southern and central Europe from Spain to the south Balkans.

Typical habitats are dry and rocky scrub on calcareous soil, and damp woodland clearings, usually between 500 and 2000m.

There is one brood per year from mid-May to August.

Larvae feed on Milk-vetches (Astragalus spp.)

It is of Least Concern on the IUCN list.


24-Jul-2018 : Vercors Natural Park, France