Hi Chris & all > I don't think perspiration of itself is a trigger. On hot days sweat has > dropped from my brow onto the top bars of a hive without provoking any > noticeable reaction. I do not think that liquid sweat is the problem, more likely the bacteria in sweaty armpits cause the smell that the bees react to. Over many years I have had bees attack the strap of my wristwatch. Best Regards & 73s... Dave Cushman, G8MZY Beekeeping & Bee Breeding Website... http://website.lineone.net/~dave.cushman