To stop biodiversity decline in Europe, new policies have been introduced to protect 30% of EU terrestrial area by 2030 including 10% under strict protection. This network of conserved areas will expand on existing Natura 2000 sites and other conservation areas, as well as blue and green infrastructure. This Trans-European Nature Network (TEN-N) will be the main EU conservation instrument to afford sufficient protection to species and ecosystems of conservation concern. This project has been funded by the EU Horizon Program (~10 M €) to support Member States in their planning and implementation of TEN-N.