|Potter wasp nest- Click to enlarge|
Some build solitary nests in small existing cavities in wood or stone, even using nail holes and screw shafts on farm equipment. Many species also construct their unique vase shaped nests of mud and regurgitated water. Wikipedia quotes studies suggesting that some Native Americans based their pottery designs on these structures.
|Potter wasp, Eumeninae family- Wikimedia|
Pictures from Wikimedia.