Yellow Jackets are very aggressive stinging insects when they are provoked or threatened. They also can sting multiple times. Loud vibrations or noises will provoke a yellow jacket as will disturbing their nest.
Yellow Jackets are void-nesters. They will either nest in a void space (wall voids, between floors of homes, crawl space voids) or in the ground. A Yellow Jacket nest can be detected by observing their high activity throughout the day. Yellow Jackets will be constantly activite starting early in the morning until dusk. Activity will be seen,going in and out of their nest opening all day. If you see this opening - DO NOT SEAL IT, this will force them to backup into your home or business. Yellow Jackets should only be dealt with by a professional. All nesting is Guaranteed.