Chalkhill Blue

Polyommatus (Lysandra) coridon

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Ppolyommatus coridon

Male, Switzerland, August 2014



Male, Switzerland, September 2012



Male, Switzerland, August 2012

Polyommatus coridon

Mating pair, August 2013

Polyommatus coridon

Mating pair, Switzerland, October 2013

Polyommatus coridon

Male, Switzerland, July 2013

Polyommatus coridon

Female, Switzerland, July 2013

Polyommatus coridon

Males, Switzerland, August 2013 (I'm not 100% sure what the butterfly in the foreground is)



Female, Switzerland, August 2012



Female, Switzerland, August 2012



Female, Switzerland, August 2012

Val d'Aran, July 2005



Male, Switzerland, July 2011



Male, with Adonis blue and Piedmont ringlets in the Pyrenees, July 2011

Two (rather different) males, Val d'Aran, July 2005



Male, Switzerland, July 2009



Male, Switzerland, July 2008

The chalkhill blue is a common butterfly of chalk grassland, from lowlands right up to high in the mountains, occurring across southern England in downland areas. It generally flies in July but may be seen in June in good years. The male is unmistakeable with his silvery blue and broad borders extending thinly across the apical half of the forewing. The female is, like most blues, brown with orange lunules, but can be recognised as Lysandra by the combination of chequered fringe and cell spot on the underside forewing. With a little experience, the underside of the female chalkhill blue is readily separated from the underside of female adonis blue, Lysandra bellargus.