Young queen wasps begin building nests in the Spring once out of winter hibernation.
Initially, they help pollinate flowers whilst feeding on nectar before laying eggs. These hatch in larvae (maggot like grubs) which need protein to grow and so the queen wasps hunt for insects to feed their growing young. After about two weeks the larval stage pupates into worker wasps who take over the work of the queen.
From this point onwards, the queen wasp remains in her nest laying many thousands of eggs. As the nest grows, worker wasps continue feeding insects to the larvae. The excrement of the larvae has a very high sugar content which the worker wasps crave.
Around September the entire structure of the nest changes. New queen wasps hatch and leave the nest to mate. The original queen stops laying eggs and eventually all the larvae pupate into mature wasps. This sees the end of the supply of sweet food therefore as many as 5000 wasps seek sugary substances to feed their craving.
It is this pursuit that makes wasps a pest. As natural hunters, they are quick to sting to get what they crave and therefore become a most annoying and dangerous visitor at mealtimes.
 

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