Three Endangered, seven Vulnerable and 40 Near Threatened species from the European Red List of Bees were recorded in Slovenia. Their distribution in Slovenia is overviewed and the importance of local populations for their survival in Europe is evaluated. Among the Endangered species the Slovenian population of Colletes graeffei is important. The species has also its locus typicus in Slovenia. Interesting is the case of Epeolus cruciger which is very numerous in Slovenia due to transition to a secondary host, Colletes hederae. Its other host, Colletes succinctus, is endangered in Slovenia.
A. Gogala (Thu,) studied this question.