Yellow Jackets are easily recognized by their black and yellow stripes. They nest in trees, shrubs, under decks, or high in the eaves, their nest is very visible and easy to identify; a football or upside down teardrop-shaped nest constructed from gray paper.
When yellow jackets nest inside a structure (such as your home), the nest is not at all visible. You’ll see them flying in and out at some small gap, crack, or crevice on the exterior of your house. You may even be able to hear yellow jackets inside. Listen to your wall or ceiling for a crackling, tickling, “rustling-leaves” sound. Those are yellow jackets going about the business of building their hive and slowly chewing through your plaster or drywall.