They are quite squat in appearance, much like a bee, but slightly larger than a bee. They also fly like bees with their legs held up close to their bodies. The nests are concealed and are usually underground, in a hollow tree or in a roof or wall cavity in a house. The multiple honey-comb layers of the nests are covered by an outer layer of papery material. Typically, the nests are the size and shape of a basketball or bigger.
European wasps are unusual as they feed on meat products .
Nest of European wasp with part of the outer covering removed. European wasps feed on meat and fish. Any sightings of black and yellow wasps settling on pet foods, fish or other meat products should be regarded as particularly suspicious and reported immediately. They also directly damage soft fruits and can cause substantial damage to grape crops. European wasps have even been reported cutting pieces of flesh from cows' teats.