I was walking through the woods, when all of a sudden, I ran into a yellow jacket nest.  They got very angry at me, and set out to let me know how angry they were with their stingers. Yellowjackets are a type of wasp that builds their nest underground. When their nest is disturbed, they will aggressively defend it. They are not above whipping out their stingers and having at you with them.  A lot of people call them bees, but they are actually a type of wasp.