John Abbott / Blue mud wasp (Chalybion californicum) Bastrop County, Texas, USA. May

Clay Bolt / Blue Mud Dauber Wasp (Chalybion californicum) on Mountain sweet pitcher plant (Sarracenia rubra jonesii) Cataract Bog, Southern Appalachians, South Carolina, USA, September.

Clay Bolt / Blue Mud Dauber Wasp (Chalybion californicum) on Mountain sweet pitcher plant (Sarracenia rubra jonesii) Cataract Bog, Southern Appalachians, South Carolina, USA, September.

Rolf Nussbaumer / Blue mud dauber wasp (Chalybion californicum) adult in flight among Old man's beard (Clematis drummondii) flowers, Dinero, Lake Corpus Christi, South Texas, USA.

Nick Upton / Blue mud dauber wasp (Chalybion sp) feeding on Rock samphire / Sea fennel (Crithmum maritimum) Samos, Greece, August.

Michael Durham / Blue Mud Wasp (Chalybion californicum) photographed with a high-speed camera. They feed Black Widow spiders to their young and will take over the nests of Black and Yellow wasps

Michael Durham / Blue Mud Wasp (Chalybion californicum) photographed with a high-speed camera. They feed Black Widow spiders to their young and will take over the nests of Black and Yellow wasps

Aishwarya Sridhar / Blue mud wasp (Chalybion californicum) feeding on nectar from a flower bud, Panvel, Maharashtra, India.