While normally a species measuring in at only around 2 millimeters in length might be easily overlooked, one tiny freshwater-dwelling critter has found a way to turn peoples' heads. Researchers studying 'water boatman' (Micronecta scholtzi), an aquatic insect native to Europe, say that the minuscule species takes the mantle as the world's loudest animal relative to its body size. The hard-to-see insect is capable of producing a song that reaches a whopping 99.2 decibles -- roughly the equivalent to the sound of a motorcycle. What may be more surprising, however, is just how water boatman make their 'song'.
To produce the intense sound, the water boatmen "stridulate" by rubbing a ridge on their penis across the ridged surface of their abdomen.
"There is at least another one insect producing sound with its genitalia. This is a pyrallid moth, Syntonarcha iriastis, that uses highly modified genitalia to produce ultrasonic signals," explained [co-author Dr. Jerome] Sueur.
"Insects seem to be able to use any part of their body to generate sound. Some of them use their wings, others their legs, abdomen, head, wings, thorax etcetera."
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