Site of observation; in the foreground, the young walnut with aphids, above (along the stairs), the black elder bush. The location of the D. quadripunctatus nest is indicated with an arrow. Photo taken on 16.07.2017 (Tadeusz Berliński).

 
 
  Part of: Czechowski W, Trigos-Peral G, Maák I, Vepsäläinen K (2019) Alate gyne of the ant Dolichoderus quadripunctatus (L.) follows foraging trail to aphids (Hymenoptera, Formicidae). Journal of Hymenoptera Research 71: 241-248. https://doi.org/10.3897/jhr.71.36286