This clicking sound is annoying me

[justinl]

if the shells dont look like they have any damage (big holes) then i doubt its a mantis. when do you generally hear the clicks? night or day? the vast majority of mantids are diurnal which means you should hear from them more often during the day than the night.

so what clicks? well mantids obviously, but also, clownfish (and a few other fish), pistols, snails (youve heard that one), and visitherm stealth heaters.