<Tr> <Td_colspan="2"> <P> Some Sphecidae and Crabronidae </P> </Td> </Tr> <P> Some Sphecidae and Crabronidae </P> <P> Mud dauber (or "mud wasp") is a name commonly applied to a number of wasps from either the family Sphecidae or Crabronidae that build their nests from mud . Mud daubers belong to different families and are variable in appearance . Most resemble long, slender wasps about 1 - inch (25 mm) in length . The name refers to the nests that are made by the female wasps, which consist of mud molded into place by the wasp's mandibles . Mud daubers are not normally aggressive, but can become belligerent when threatened . Stings are uncommon . </P> <P> The organ pipe mud dauber, one of many mud daubers in the family Crabronidae, builds nests in the shape of a cylindrical tube resembling an organ pipe or pan flute . Common sites include vertical or horizontal faces of walls, cliffs, bridges, overhangs and shelter caves or other structures . </P>

What kind of bug makes a mud nest