A Bombus hortorum/subterraneus collecting nectar in 1991 at site 1 B B. wurflenii/lapidarius worker robbing nectar of Gentiana asclepiadea in 2017 at site 2 C B. wurflenii/lapidarius worker taking nectar from a male stage flower in 2017 at site 2 D B. wurflenii/lapidarius and pollinating Epilobium angustifolium at site 3.

 
 
  Part of: Kozuharova E, Simeonov V (2022) Monitoring bumblebee pollinator visits to the medicinal plant Gentiana asclepiadea L. (Gentianacese) – a comparison between the periods 1990–1994 and 2017–2020. In: Chankova S, Peneva V, Metcheva R, Beltcheva M, Vassilev K, Radeva G, Danova K (Eds) Current trends of ecology. BioRisk 17: 317-327. https://doi.org/10.3897/biorisk.17.76577