Wasp Pottery

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I didn't need to travel far today to discover an entomological wonder.  Attached to my porch railing was a tiny, clay pot; the handiwork of a Potter Wasp (Eumenes sp.).   As their common name describes, potter wasps fashion small rounded jug-like nests out of clay, and they attach the nests to leaves, twigs, or to structures such as window seals or in my case, a porch railing.

 

Potter Wasp

 

The 3/8" - 3/4" long potter wasp females don't gather mud for their nests.  They first collect water and then mix it with dry soil using their mandibles.  The mud mixture is transported to the nest-making site where it is fashioned into individual pots ranging in size from 1/4" - 6/16" in diameter.  The entire construction process may require hundreds of trips over several hours.

 

Potter Wasp

 

Potter Wasp Larva

 

Potter Wasp Pupa

 

The wasp belongs to the family Vespidae, which includes paper wasps, yellowjackets, and hornets.  Of course, potter wasps create their nesting artistry using clay rather than paper.  As the pot nears completion, the female lays a single egg attached by a thread to the inside surface of the nest.  They then provision the pot with a caterpillar or beetle larva that has been paralyzed by a sting.  Once provisioned, the pot is sealed with a clay plug leaving the hapless paralyzed prey to await the wasp's hatchling larva.  Thus, potter wasps are considered beneficial … to all but their prey!