Giant dobsonfly with 21 centimeter ( 8.27 inch ) wingspan found in Sichuan for the first time . This may be the world 's largest aquatic flying insect . Comment:
Giant dobsonfly with 21 centimeter ( 8.27 inch ) wingspan found in Sichuan for the first time . This may be the world 's largest aquatic flying insect . The presence of the dobsonfly indicates clean water is nearby .