In recent years, the European hare and otter, red, fallow and roe deer as well as wild boar have increasingly become a part of faunistic reports to prepare environmental impact assessments for road construction and other infrastructure projects. In some cases we carried out the entire planning process (e.g. airport Kiel-Holtenau), while in other instances we wrote faunistic reports for medium to large sized mammals for road construction projects (e.g. B5 Tönning-Husum, Husum-Hattstedt; B207 Heiligenhafen-Puttgarden; A7 Bordesholm-HH Schnelsen) or proposed wildlife crossings (green bridges, tunnels, river subways, etc.) as compensatory measures. In Schleswig-Holstein, we conducted research projects on European hares, organized the mapping of the otter population and provided an expert opinion on trapping.