 Larval backswimmers were found to create different waves that differed from adult backswimmers, but their frequency were similar to that of adult swimming produced waves (up to 70 Hz).Water depth can affect how "N. glauca" pick which prey they eat.Males and females both spend a lot of time on the surface of the water where they encounter Culex larvae.They feed on this prey because there is a decrease in travel cost (having to dive for them) and "Culex" gives a higher energy rate.