Aggregation of foul water mosquitoes (<I>Culex quinquefasciatus</I> and <I>Culex stigmatosoma)</I> near the outflow of secondary-treated sewage entering a constructed treatment wetland.
Aggregation of foul water mosquitoes (Culex quinquefasciatus and Culex stigmatosoma) near the outflow of secondary-treated sewage entering a constructed treatment wetland.
Credit: William E. Walton