red-breasted merganser, Mergus serrator
["dragonfly, darning needle, devil's darning needle, sewing needle, snake feeder, snake doctor, mosquito hawk, skeeter hawk", 'little blue heron, Egretta caerulea', 'hammer', 'damselfly', 'flat-coated retriever', "plunger, plumber's helper", 'hammerhead, hammerhead shark']