Some individuals are more sensitive than others, due to allergic reactions, and should seek medical attention when stung. However, yellowjacket stings pose a more serious threat to humans than bees, because a yellowjacket’s stinger is not barbed like a honey bee, allowing it to sting repeatedly. Yellowjackets are slow to sting unless their nest is threatened. Yellowjacket Behaviors, Threats, or Dangers Locating the nest, through observing flight patterns, is essential to eliminate them. These aerial nesters don’t become scavengers in the fall, but they are extremely defensive when their nests are disturbed. The entrance of the nest is normally a hole located at the bottom. Occasionally, the nest may be constructed on the side of a building, in wall voids, under eaves, crawlspaces, and attics. Above-ground nests are found among the leafy branches of trees and shrubs and also on structures. ![]() Yellowjackets can be divided into ground nesters, which frequently use old rodent burrows, and aerial nesters. Adult yellowjackets feed mainly on fruit juices and other sweet liquid materials, whereas their larvae are fed bits of soft-bodied insects like caterpillars and flies. ![]() These beneficial wasps live in colonies with thousands of individuals and would be a lesser threat to humans were it not for their opportunistic behavior of nesting in structural voids, attics, and cavities associated with landscaping features. Found throughout the United States, yellowjackets, along with European hornets, are the most infamous structure-infesting wasps.
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