Spider wasps (Pompilidae) are a cosmopolitan wasp-family with some 5000 species. They all are solitary (do not form colonies). They capture and paralyze prey (spiders), which serve as food for  their larvae. Some spider wasps construct borrows in sand (below), where they deposit the paralyzed spider, whereas others build clay nests with a cell for each spider/larvae (left).  

 

 

 

Blue wren enjoying a free meal (top)

Spiders found in one nest (below).