Great pic Mark
Chilling insects down is certainly an option used. We did a shoot once with Damselflies, and bumble bees, all of which had to be in flight. We had an insect specialist from the Oxford Scientific Film unit working with us, and he used a spray to temporarily knock out the insects, so that he could use a slightly warmed and very soft wax to attach a fuse wire to their abdomens. After a minute the wax would set, and the insect would come around. If you placed them on their feet on a surface (holding the other end of the fuse wire) they were fine, but once you lifted them from the surface they would start flapping their wings to fly ! We could then shoot the pics with them flying exactly where we needed them and within 5 mins they'd be knocked out again, the wax warmed up a little to remove the wire, and they'd come around and fly off into their enclosure. We did that for about 5 days
Tony