Alpine longhorn beetle aka Rosalia longicorn, Rosalia alpina, Cerambycidae

This species is found from the Cantabrian Mountains in Spain east through the Caucasus region. It is considered vulnerable due to habitat loss and is protected in a number of countries. Although striking in appearance, it is camouflaged well against its preferred host tree, the European beech:

Photos 1-3 by kostaszontanos, 4 by rogervila, 5 by lazar_zenit, 6 by per-hoffmann-olsen, 7-8 by matthieu_gauvain, 9 by martin_galli, 10 by per-hoffmann-olsen, and 11 by Franz Xaver