What's Your Favourite Honey?

Red-tailed bumblebee nectaring on ragwort 23 July

 Last summer I was in the Outer Hebrides, walking beside the Atlantic Ocean through the machair- a shell sand dense with white clover.  In the afternoon the sun broke through the clouds, the ocean lit all shades of aquamarine  and as the temperature rose the flowers of the machair released their nectar and a heady fragrance filled the air.  Sensational.  I long for white clover honey to taste the day once more. 
So, what’s your favourite honey: clover,  heather, manuka?  I doubt anyone would opt for ragwort honey but wild bees are eagerly nectaring on its flowers.  Don’t they know it’s toxic?

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The cinnabar moth caterpillars thrive on ragwort, absorbing its toxins into their own bodies and none the worse for it.  Their bold yellow and black is a warning to predators .  Noxious and best avoided.  Presumably birds leave them alone.
Red-tailed bumblebees are  nectaring on ragwort.   Wild bumblebees, their furry bodies dusted with pollen  as they forage,  deep in flowers.  There’s  an intimate relationship between  bees and flowers.  Ragwort flowers attract several species of bee which fly from flower to flower in a spurt of buzzing, a vibration that loosens nectar in flowers eager for pollination.  The bees delve deep,  down out of sight amongst petals, between flowers.   Caterpillars of cinnabar moths munch the ragwort  and shrug up  stems for fresh leaves in a spurt of elastic wriggling.  Don’t they know ragwort is poisonous?

  I want to understand  where the toxins are in ragwort and why the bees are unaffected.