p7110105 close-up of a grousewinged backswimmer notonecta undulata under the water surface feeding on a bloodworm, british

america animal aquatic arthropod arthropoda backswimmer bloodworm blue british bug canada chironomid close closeup columbia creek detail eyes fauna feeding freshwater green grousewinged hemiptera insect insecta invertebrate lake macro natural nature north notonecta notonectidae photography pond predator predatory pretty red river spring states stream submerged summer swamp swimming undulata united wild