Thanks!
I was working the scene and did several compositions around that spot. Then I found this and went to focus on the rock using live-view and it was like "wow that is a nice gift!" For the truly sharp eyed, there are actually two midges on the rock the the Cranefly's right that figure in more prominently in another shot from the sequence... The EF 100-400 f4.5-5.6 LII lets one do some really cool things...