 However, after winter when the nests are starting to be formed, an increase in relatedness in the nests is seen, which could result from foundresses searching for more related sisters, instead of unrelated wasps.After winter, as wasps leave their winter areas and return to their nests, an increase in relatedness occurs in the early nest phase.In later stages of the nest, more unrelated wasps are found, which could be because new wasps join established nests.