There are many species of paper wasps in the US. Paper wasps average 3/4″ to 1 1/2″ long; yellow and black in appearance. Nests are made of grayish brown papery material. Paper wasp nests are relatively small containing 4 to 30 wasps per nest not, to be confused with hornets which build much larger hives and can be similar in size. Paper wasps are often found hanging under the eaves, but can also be found in attics, trees, as well as other structures. Paper wasps attack when aggravated and have a painful sting; they can also sting multiple times and do not loose there stinger.
Occasionally these wasps are found inside the house. This happens when a nest is living in the attic and there is perhaps a bit of light entering the attic from a wall vent or ceiling fixture. In this case the wasp goes to the light thinking it leads back outside but ends up in the house. At this point the wasp will typically fly around near the windows looking for an exit. Wasps are much more comfortable navigating inside of a house than honeybees are, as honeybees simply go straight to the window and buzz until exhausted.