Appreciate your comment, and your dragonfly photography is fabulous. But the method you describe is only really feasible if you use back button focus. Unfortunately at 70 my coordination is no longer good enough to use that method.
If the AF is activated normally (by half press of the shutter button), the camera will start focusing *before* I get the camera to my eye, and that means it might be hunting like crazy searching for a bird that isn't yet even in the frame. The best workaround I've found, for my own style of shooting, is to momentarily tap the preview button to activate the EVF (but not the AF), before I raise the camera.
The real point I think is that Canon needs to invest in tech to reduce the EVF activation time to near-zero, and to introduce a simple firmware update that will enable users to keep the EVF active for more than 4 seconds after the eye is removed from the eyepiece - if I'm hand holding a 100-400mm or heavier lens, my arms need a rest occasionally, and I don't want to have to keep tapping a button to keep the camera awake if I remove it from my eye for a few seconds.