The FFH-Gebiet Oberes Donau- und Aschachtal is another important habitat for endangered flora and fauna.
The 7,119 ha big FFH reserve "Oberes Donau- und Aschachtal" consists of two totally different parts: The Danube valley with its steep slopes between the border near Passau and Aschach and the ravines of the small river Aschach between Waizenkirchen and Hartkirchen.
The landscape of the bird reserve is formed by ravine forests and rocky slopes. In the flat hillsides dry and wet slope and ravine forests, oaks and beech trees move to mixed forests.
Besides, heaps of rubble and impressive rock formations can be found near the Schlögener Schlinge.
Some rare fish species live in this part of the Danube.