While in the Columbia Village subdivision in Boise, Idaho, Mike observed the following:  

Five paper wasp nests all sharing the same real estate. Paper wasp begin a new nest each year after the queen overwinters. She begins construction on an umbrella shaped upside down paper-mâché like nest. Paper wasps love to build their nests in covered or protected areas-like eaves. By late summer and early fall, numbers in these colonies can exceed a few dozen. These wasps will protect their nests aggressively against intruders, and can sting repeatedly. Regular pest control treatments are necessary to kill and remove these unsightly and potentially dangerous nests.