Dead trees / Walls / Open buildings / Bushes / Attics / Fireplaces / Straw bales or compost heaps.
The European hornet feeds mainly on insects such as flies, wasps, bees, locusts, dragonflies, caterpillars and spiders. He can hunt day and night.
The European hornet is not an aggressive insect, nor a spontaneous biter. In principle, a hornet does not attack unless you get too close to its nest (less than 3m).