In Wallonia, a growing amount of projects on ecosystem services (ES) are conducted. These projects implement the ES concept at different spatial scales (ranging from the country scale to the plot scale), focus on some particular ES or consider all of them and finally, rely on one or multiple valuation types (i.e. biophysical, social and economic). With their multiple dimensions they feed each other with reflexions and methods. The aim of the stand is to give an overview of these ongoing projects taking place in Wallonia. Their similarities and common objectives will be highlighted on posters while their specificities will be presented by means of games, activities, quiz, etc. We hope to stimulate discussions and debates on our methods and results, to foster networking and knowledge exchange. Hereunder, we give a short overview of these projects to give hints on the diversity addressed by our stand. At the Belgian scale, BELBEES, a project funded by BELSPO, aims to identify the factors responsible for the decline of wild bees. Different hypotheses are tested, including the impact of land-use changes and the reduction of floral resources availability at geographical and temporal scales. The results will allow tracking historical community-level changes in pollination service at a biogeographical scale. Such initiative is a step forward in the perspective of ecosystem service mapping. In Wallonia, various projects on ES are underway: Wal-ES, a federating platform between the Walloon administrations and the scientists, aims to create and disseminate decision support tools based on the ecosystem services concept. In order to build the common core for these tools, Wal-ES defines a conceptual framework, an integrated ecosystem services valuation framework and a database regrouping all the information needed to assess ES in Wallonia. This platform helps to conduct a practical application of its integrated ES valuation framework to land planning at a local scale. This application aims to define a methodology for impact ...