Danish orchid populations

The monitoring of Danish orchid populations and their habitats was initiated in 1943 when the Buderupholm State Forest District commenced counting the local population of Lady's slipper (Cypripedium calceolus). The monitoring of more orchid species started in 1982. Since then all 45 native Danish orchids have been monitored for a longer or shorter period e.g. confined by habitat deterioration or population extinction.