Come and discover the flora and fauna of the Marais de Sacy in spring on Saturday 9 May from 3pm to 5.30pm. This activity is organised by the Conservatoire d'Espaces Naturels des Hauts-de-France, in partnership with the Seine-Normandie Water Agency - Oise Valleys Directorate, the commune of Sacy-le-Grand and the Conseil Départemental de l'Oise, as part of the Hauts-de-France Nature programme. Bring walking shoes, binoculars and camera. Dogs are not permitted.