Our aim is to minimize the number of roadkills as much as possible by finding the influencing factors. The first step is getting an overview of the numbers and distribution of roadkills. The use of citizen science makes it possible to investigate large areas and determine when (weather, season, ...), where (forest, urban area, field, ...) and on which streettype, what kind of animal species is killed. The second step is to identify roadkill hotspots and mitigate those hotspots in cooperation with local authorities and NGOs. Our vision is to warn drivers of roadkill hotspots (road sections with a high density of roadkills per year) according to location and season by implementing our data in satnavs. With the project Roadkill, we want to sensitize participants to roadkill and habitat fragmentation and to include the public's expertise in when and where roadkills happen.