On that line, I visited my Dads today, and he has a lovely overgrown garden, full of little fluttering critters, so I couldn't resist. All shots hand held, Tamron 60mm Macro, pop up flash used for fill in and to combat the changing light, f8-16 shutter 160-200 (a couple of direct sunshine shots are faster but I cant remember which). Focusing a mixture of auto and manual (setting a magnification and rocking back and forth).
Some conclusions:
Butterfly's, furry sparkly hard to focus on, plus they never keep still!
Bees, similar.
Blue ***** fly, a tart modelled for me and didn't move, manual focus. High contrast easyish to get in focus (unlike the previously mentioned hairy beasties).
Wasps, a macro critter photographers best friend, high contrast, can use auto focus, don't spook easily and didn't get agitated with my intrusion, though the fact they were feeding was my saving grace, there were about 30 of them buzzing about on one group of flowers.