WordNet (r) 3.0 (2006):

snake feeder
    n 1: slender-bodied non-stinging insect having iridescent wings
         that are outspread at rest; adults and nymphs feed on
         mosquitoes etc. [syn: dragonfly, darning needle,
         devil's darning needle, sewing needle, snake feeder,
         snake doctor, mosquito hawk, skeeter hawk]