A look inside the PlantNet experience Multimedia in ecology Joly, A. Bonnet, P. Goeau, H. Barbe, J. Selmi, S. Champ, J. Dufour-Kowalski, S. /Affouard, Antoine Carre, J. /Molino, Jean-François Boujemaa, N. Barthélemy, D. Pl@ntNet is an innovative participatory sensing platform relying on image-based plants identification as a mean to enlist non-expert contributors and facilitate the production of botanical observation data. One year after the public launch of the mobile application, we carry out a self-critical evaluation of the experience with regard to the requirements of a sustainable and effective ecological surveillance tool. We first demonstrate the attractiveness of the developed multimedia system (with more than 90K end-users) and the nice self-improving capacities of the whole collaborative workflow. We then point out the current limitations of the approach towards producing timely and accurate distribution maps of plants at a very large scale. We discuss in particular two main issues: the bias and the incompleteness of the produced data. We finally open new perspectives and describe upcoming realizations towards bridging these gaps. Spampinato, C. (ed.) Mezaris, V. (e.) Van Ossenbruggen, J. (ed.) 2016 text https://www.documentation.ird.fr/hor/fdi:010068289 fdi:010068289 Joly A., Bonnet P., Goeau H., Barbe J., Selmi S., Champ J., Dufour-Kowalski S., Affouard Antoine, Carre J., Molino Jean-François, Boujemaa N., Barthélemy D.. A look inside the PlantNet experience. In : Spampinato C. (ed.), Mezaris V. (e.), Van Ossenbruggen J. (ed.), . Multimedia in ecology 2016, 22 (6 (no spécial)), 751-766 EN