Slovenia Post issued a set of four stamps in three single stamp and one in souvenir sheet stamp that dedicated to the bumblebees species, e.g: the Red-tailed bumblebee or Bombus lapidarius, the Common carderbee or Bombus pascuorum , the Brown-banded carder-bee or Bombus humilis , the White-tailed bumble-bee or Bombus lucorum on September 28, 2012.
Red-tailed bumblebee or Bombus lapidarius is one of the larger bumblebees in Slovenia. It is covered with black and, at the end of its abdomen, red hairs. They have a medium long tongue, 10-14 mm.
These bees prefer to nest underground and the base of dry stone dykes and walls are popular locations. The size of the nest can vary considerably from over 200 bees to less than 100.
Colonies are strong, with 100 to 300 individuals.Workers fly to forage,as far as several kilometres from the nest. They pollinate over 200 species of,plant, including many cultivated ones such as fruit trees and clover.
