 The fungus is rare in Europe and its distribution typically corresponds with high elevations at or near the alpine tree line . It is found in at least 11 countries , and has been included in the Red List of 8 countries . It is considered critically endangered in the Czech Republic . The European Council for Conservation of Fungi ( ECCF ) has suggested Suillus sibiricus be listed in Appendix II of the Bern Convention . Factors that threaten the habitat of S. sibiricus include deforestation and construction of skiing pistes and other infrastructure for winter sports . 
