Paper wasps are named as such because of how their nests are constructed. Those familiar honey-comb like nests we often see attached on eaves and ceilings are actually made of plant material processed with the insects’ saliva to achieve a paper-like effect. Unlike other species, wasp nests have no outer shell so the cells in which they keep their food and young are pretty exposed. The queen usually builds her nest on the onset of spring. For people, paper wasps can be considered both a blessing and a curse from nature. These critters aid natural pollination by feeding on nectar and help control pest populations by hunting other insects such as caterpillars and feeding these to their larvae. As the larvae grow, they help expand the nest to accommodate future generations.
http://www.invader.net/info-articles/phoenix-bee-removal-what-a-homeowner-must-know-about-paper-wasps/
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