Although their yellow and black stripes are similar to those of bees, yellow jackets are not bees. Yellow Jackets are wasps. They are very social creatures, living in colonies that may contain thousands of yellow jackets at one time. These colonies can be found under porches or steps, in sidewalk cracks, around railroad tracks, at the base of trees, in low hanging branches, bushes, and on the corners of buildings. These flying pests are scavengers of human food and can be found surrounding trash cans or around decks. Yellow jackets also feed on nectar, but they depend primarily upon insects, meat and fish for nourishment. Beware of these wasps as they may sting at the slightest provocation.