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Plebejus idas - male

Posted by
Johan Dierckx (Wijnegem, Belgium) on 14 October 2011 in Animal & Insect and Portfolio.

Plebejus idas (NL: Vals heideblauwtje / EN: Idas Blue; Northern Blue / DE: Idas-Bläuling; Ginster-Bläuling / FR: Azuré du genêt; Moyen argus) is a butterfly of the Lycaenidae family. Plebejus idas can sometimes be hard to differentiate from the Silver-studded Blue (Plebejus argus), not to mention possible confusion with Reverdin's Blue (P. argyrognomon) where the latter occurs. P.idas is a very variable species. The male upper-side is a strong bright blue with a narrower black border than P.argus and wide white fringes. The female (see image on 14/08/2010) upper-side is brown with varying amounts of blue, with marginal lunules more prominent than P.argus. There are sometimes no silver centres to the marginal spots, or at least, that's how it appears - the silver is often a question of the viewing angle. Also the orange on the underside fore-wing lunules does not extend to the apex as it does on P.argyrognomon. The foreleg in P.idas lacks a spine which is present in P.argus but to see this, you surely need a good magnifying glass.

Image: Maloja (CH) - 18/07/2011

Canon EOS 400D 1/125 second F/5.6 ISO 200 150 mm

© Johan Dierckx

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All species are photographed in their natural habitat, without cutting or capturing them, and with maximal respect and the least possible disturbance to the environment.

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Magda from Vancouver, Canada


14 Oct 2011 5:06am

Demo from Villeneuve d, France

Fantastic as usual for you ;)

14 Oct 2011 6:05am

Aubélia from Kortrijk, Belgium

Heel mooi

14 Oct 2011 8:33am

omid from mashhad, Iran


14 Oct 2011 10:20am

jay from MUMBAI, India

Terrific Deatailing On That One

14 Oct 2011 11:00am

Stefan from Thiersee, Austria


14 Oct 2011 7:47pm

Ralf Kesper from Attendorn, Germany

Very pretty!

14 Oct 2011 10:43pm

Lia from Zwolle, Netherlands

Erg mooi Johan.
Goed scherp en hij komt prachtig uit tegen zo'n rustige achtergrond.

18 Oct 2011 8:08pm

Canon EOS 400D
1/125 second
ISO 200
150 mm