Posted: 11/08/2012 at 22:27
i'm guessing this may be unrelated but today i saw a hissing bee (or more likely a stripy bee-like fly) on my walk across moorland on lewis. i heard the loud eerie hissing sound and eventually deduced it was from this fly/bee. even weirder it only seemed to hiss when it was still - as soon as it was disturbed the hissing stopped. perhaps a method to attract mates? if anyone can tell me what this may be i'd be keen to find out.
more likely to be of relevence to your post though, i came across this:
Hissing in bumblebees: an interspecific defence signal