NFI knowledge about the Swiss forest

An information service about the Swiss National Forest Inventory by the Swiss Federal Research Institute WSL.


Latest results

The intermediate results of the fifth National Forest Inventory (NFI5) over the first five survey years (2018–2022) are available for retrieval. All previous results have been recalculated.

Formica rufa

Forest ants

Where do the five most common species of red wood ants (Formica rufa group) live in Switzerland? New maps provide information.


Forest photos

Take a look into the forest. The NFI puts more than 40,000 photos online, with which you can explore the forests of Switzerland - comfortably from home.