This hummingbird is sipping nectar from a South African Torch Lilly (Kniphofia uvaria).
I was out taking insect and flower macros when this hummingbird started zipping around. Normally that's my cue to switch to my tele-zoom (and blow my opportunity), but that day I just opened my aperture as wide as possible on the macro lens that I was using, and tried my luck.
I got some pretty decent shots, but this one was my favorite (even though I had to crop it quite a bit). I also had to do quite a bit of post-processing to improve the noise in the bokeh and make it smooth.
I'm guessing that if I had a lens with a longer focal length, with image stabilization, and f2.8 (like my 100mm macro lens, but unlike my 70-200mm) I'd have been able to get this result straight away...or maybe that's just me trying to justify an upgrade :D