I'm forever recommending that new BIF shooters find a location frequented by seagulls and practice on them. Last week I did just that. I had tuned my bodies to the 500mm lens just prior to heading out on a week of shooting. So while waiting for something to happen with the bears I shot a few gulls to see how the gear was working. I also toyed around with some different plug-ins during PP.
I just love shooting BIF.