The caterpillar of the chalk-hill blue shortly before pupation, on its host plant horse-shoe vetch, being visited by an ant. Photo: Albert Krebs (E-Pics ETH Zürich). Publication with permission of the copyright holders.

 
 
  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