One of the most aggressive wasps, the yellow jacket won’t think twice about defending its home from any potential intruders. Some people may wonder, “How am I supposed to differentiate all of these bugs?” A key trait of the yellow jacket is its thin “waist” or area between the abdomen and thorax. Especially because of the recent desire to help save the bee population, we want to be able to identify insects as accurately as possible. These wasps frequently inhabit man-made structures like crawlspaces, attics, and the crevices of houses or other buildings. Caution is recommended in the case that you believe you may have a yellow jacket infestation. These aggressive insects can sting and leave you with painful swelling. For people that may be allergic, the sting can be fatal and require immediate medical attention.