Camera trapping is increasingly becoming an important tool in ecological research. However, the organization of large collections of files and reuse of these data is a challenging task. We designed TRAPPER, a flexible, web application to manage, classify, integrate,share and re-use data in camera trapping projects. TRAPPER can therefore be widely used by ecologists working with a variety of camera trap studies. Full version of the paper: goo.gl/BZjc4a