Lilacs and Butterflies!
I cannot take credit for having expended a great deal of effort hunting the very illusive rare Yellow Swallowtail and finally in the nick of time capturing an image that will be remembered for all time :)
Actually I was doing some chores around the house when I noticed the butterfly visiting the lilac bush beside our driveway. I popped in the house and grabbed my Canon with the 100-400 L lens still attached from my morning shoot and pressed it into close-up duty.
This lens is capable of focusing at 1.8 meters while zoomed to 400mm. The posted image has not been cropped. I can see that with this level of performance I will be using this lens extensively for butterfly hunting once the little critters become more numerous.