It's tricky to just shoot one active subject, even more fun when they start pushing each other out of the way (second image).
Tech Specs: Canon 70D (F14, 1/250, ISO 200) + a Canon MP-E 65mm macro lens (2x and 2.5x) + a diffused MT-24EX (flash head "A" set as the key on a Kaiser Adjustable Flash Shoe and "B" as the fill). This is a single, uncropped, frame taken hand held.
I cut an Eggplant flower and used gaffers tape to secure it to a leaf so it would be in a good position and I'd have something to keep the background from being black. When they started feeding I wrapped my left hand around behind the leaf to keep it steady and then rested the lens on that same hand. Video of the studio.
There's a difference in the color and saturation between the two images because the sun was out for this second shot and it influenced the scene even though I was shading the bumblebees. [IMAGE'S LINK: https://flic.kr/p/yWjRhy]Bumblebee Studio Series 1-2 by John Kimbler, on Flickr