The chalk-hill blue is also found on rocky cliffs with limited accessibility. The butterflies use the small grassy habitat patches, which are scattered over the steep slopes. Baile Herculane, Cerna valley, south-western Romania, 29.VII.2010. Photo: Thomas Schmitt.

 
 
  Part of: Schmitt T (2015) Biology and biogeography of the chalk-hill blue Polyommatus coridon – insect of the year 2015 for Germany, Austria and Switzerland. Nota Lepidopterologica 38(2): 107-126. https://doi.org/10.3897/nl.38.4977