insectlove: fuckyeahmoths: Tau Emperor (Aglia tau)
family Saturniidae (Silk Moths)
Wingspan: 60-84 mm. The moth flies in one generation from March to July depending on the location. The larvae primarily feed on European Beech, but also Birch, Alnus glutinosa, Salix caprea and Sorbus aucuparia. (via: Wikipedia)