The karst landscapes in the southern European mountain regions have many habitats suitable for the chalk-hill blue. The habitat here is in the border region of Bulgaria and Greece at an altitude of about 1500 m asl. Trigrad, southern Bulgaria, 04.VIII.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