Water bug's chirping sound made with penis

[SplitDik (imported)]

In the article there is a further link to the scientific paper but it is pretty boring in its technical detail.

http://arstechnica.com/science/news/201 ... the-tv.ars

Size doesn't matter for sound-producing penis: Ah, where to start with the weirdness in this one? An author with the last name of "Windmill"? A title that starts off with "So small, so loud"? Or the fact that the loud noise is produced by an animal's penis? Apparently, the chirps the insect produces are, when scaled for body size, the loudest thing anyone's discovered, and can reach over 100 decibels, which should be audible to people walking past the places this water bug calls its home. And it makes them by rubbing one of its "genital appendages" across a ridge on its abdomen, with groups of males sometimes joining up to form a chorus.