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Wasp nests can appear wherever the queen decides to build a nest. Places like garden sheds, cavity walls, rolls of disused carpets or even the attic are all likely places to find an active nest. The fertilised queens will hibernate over Winter and with the emergence of Spring they find a suitable nesting site and lay 10-20 eggs. She looks after these eggs herself until they emerge as sterile female workers
These workers then take on the responsibility of looking after the maintenance and expansion of the nest whilst the queen continues to rapidly grow the size of the colony. The peak of the nest is usually in September when there can be between 5 and 10 thousand wasps within the colony.
At this time the fertile male and female will be laid. As these mate the females will become next years queens. The whole process then starts all over again into the following year.