Thank you, Winston. Used a Nikon D700 with a manual focus 3.5 micro. In flight insects are quite impossible with AF. Using as small an aperture as possible but avoiding diffraction, (this lens has plenty depth of field which helps make it a classic) I was trying to focus while the bugger was gathering but with little success due to the finicky nature of its bud selection. It wouldn't sit still. Perhaps all the blossoms were nectar'd out for a bee of its size so it took off.
Now the sweat one can acquire from manual focusing moving insects, with a zero working distance lens, can burst upon the brow in thirty quick panicky seconds. So with all that intense work invested, my heart sank when I saw it zoom off. But thought and desperation were quick: I anticipated the focus with one quarter twist while choosing an intercepting angle then machine-gunned the shutter in a farewell cry of FU. Anger, skill and luck joined hands to give me the shot.