The imagoes of the chalk-hill blue often congregate in sleeping groups in the evening. Many individuals can assemble at exposed places, to utilise the last sunshine of the day. Gánt, Vértes mountains, western Hungary, 08.VIII.2014. 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