Serendipitousness?

Wall stripping proceeding apace. If you saw today's area you'd see why it took so long. The lower section needed to be done sitting on the "deck" with the right arm at full stretch and the head turned 90˚ to the right: not a position one can easily sustain. Higher section, similar. Top sect up a ladder, more of the same.
"Weigh HAY!" Nous avons terminé.

By way of distraction / light entertainment I had a wander around the garden. It was to be "Last Rose of Summer?" when I noticed the hoverers.

It was only when I came to "compute" them that I noticed a 
+ve & a -ve variation.
Curiosity piqued I did a search. The only one I have either tagged OR Blipped is this one. A search on my Flickr© page found 4 photos containing a total of 14-15 of the little critters and only one is like the left hand side one.