Orchid discovery outing on Mont Calipet with G. Hennequin (ADREPPE) and C. Galet in partnership with the Conservatoire d'espaces naturels des Hauts-de-France. This outing will provide an opportunity to make the link between environmental conditions, the history of the site and the presence of typical plant species such as orchids. This activity is brought to you by the Conservatoire d'espaces naturels des Hauts-de-France, in partnership with ABMARS.