In addition to the many species of birds, there is a range of large butterflies in the various spruce woods that, outside of the Harz, are seriously endangered or simply non-existent. Two species will be mentioned here as examples. Gnophos sordarius occurs in old, open wood-reed spruce forest, sometimes in connection with stone runs or bog spruce forests; Enthephria caesiata is a native of the bilberry-rich bog spruce woods.
In addition to the many species of birds, there is a range of large butterflies in the various spruce woods that, outside of the Harz, are seriously endangered or simply non-existent. Two species will be mentioned here as examples. Gnophos sordarius occurs in old, open wood-reed spruce forest, sometimes in connection with stone runs or bog spruce forests; Enthephria caesiata is a native of the bilberry-rich bog spruce woods.