Rhône list

General index

Idas Blue

(Plebejus idas)


Male on broom, 22/06/05 Rhône (69)

Male 18/08/07 Rhône (69)

Male 14/06/18 Rhône (69)

Male 21/08/12 Rhône (69)

Male on broom pod, 09/07/13 Rhône (69)

Male 26/08/08 Rhône (69)

Male on heather, 18/08/13 Rhône (69)

Male on oregano, 08/07/15 Rhône (69)

Female 16/09/03 Rhône (69)

Female 26/05/09 Rhône (69)

Female 18/06/08 Rhône (69)

Female on broom, 23/08/12 Rhône (69)

Female 20/06/12 Rhône (69)

Female 09/07/13 Rhône (69)

Female 21/08/13 Rhône (69)

Egg on broom, 26/05/09 Rhône (69)

Ant attending an egg laying site, 26/05/09 Rhône (69)

Typical dry habitat with sparse grasses and brooms, 26/05/09 Rhône (69)


Idas Blue tends to be a rather variable species regionally, both in terms of appearance and habitat relating to different possible larval food plants. On my home ground near Lyon it is very local and tends to fly in dry grasslands amongst broom heathland.....the French common name 'Azuré du genêt' being most adequate in these circumstances. I have seen a female laying on Cytisus scoparius, and the species always seems to be found around this plant. On the underside of the hindwings there are usually at least a couple of arrowhead shaped, black lunules in the postdiscal area and the white area inside them contrasts with the ground colour of the wing even in the paler male. The very similar P.argyrognomon has a basically all whitish appearance in this respect and without the arrow shaped lunules. The upperside of the male of P.argyrognomon is usually a darker blue than that of P.idas. Most of the females of P.idas which I have seen have been brown on the upperside with a series of steeply arched orange lunules on the hindwings. However, as with the females of many blue species, they are susceptible to a variable amount of blue scaling.

Rhône list

General index