The 20th century has been marked by a larger space left for citizen participation in the public arena. However, the impact of these initiatives remains to be investigated. This article explores the way a science-based program promoting citizen initiatives for biodiversity can encourage adults’ involvement. It is based on the example of an environmental education program launched in the Long Term Ecological Research platform (LTSER) Plaine et Val de Sèvre area (France) : Mon Village Espace de Biodiversité. Various levels of environmental action are proposed to inhabitants through this program. The installation and the observation of a wooden insect shelter in private gardens (individual level) ; the participation to the management of a publi...