Yellowjackets are aggressive pests that possess a painful sting and bite. Most yellowjacket workers forage for food within 300 meters of their nest. Their nests are usually built underground, although some species will construct their nests in hollow logs, trees, attics, between walls, or under eaves of houses. They often build massive nests underground with many levels of cells (upwards of 100 levels). Their nests have a thick protecting covering on the outside of the nest and a usually one entrance. The first cell layer hangs from the inside of the envelope and each subsequent layer of cells hangs from the one above.
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