You've really got to see one up close to appreciate them. We too will go years without seeing them, then they show up in numbers. Same drill, first they bomb the decoys, then they become annoyingly aloof!
My son splashed one last year that the wind carried out of retriever range. We piled into the boat and went tearing after it. I confess that normally we unceremoniously snatch downed birds from the water and steam in as fast as we can to avoid spooking the next flight. However, in this case when I picked up the splendid drake Gadwall, I had to lay him out on the seat, kill the motor, and call my boy back to marvel at the bird. The mature drake's plumage was absolutely amazing!
We were so involved in our study of that bird that we lost track of time. We were only snapped out of our trance by the guys in the blind, calling on the radio, concerned that we were broken down!
Thanks for sharing the photo.