TIL the Water Boatman insect can produce 99dB of sound by rubbing its penis across its abdomen User jumpyoyster, in the Today I Learned (TIL) subreddit, 23 Nov 2018
TIL a species of lesser boatman creates an up-to 99.2 dB sound by rubbing its penis against its abdomen making it the loudest animal in proportion to its size. User traumatictarpon, in the Today I Learned (TIL) subreddit, 16 Jul 2018
TIL that a 2mm (0.08 inch) big bug called Microneta scholtzi is able to make a sound as loud as a passing freight train with its penis and is therefore considered the "loudest of all animals". User HomeOnReddit, in the Today I Learned (TIL) subreddit, 20 Apr 2014
TIL: The Water Boatsman bug, 5 to 15mm in size, can make noises of up to 100 decibels... with its penis. User Sokonomi, in the Today I Learned (TIL) subreddit, 04 Jan 2013