So silhouettes were my goal, but the problem was I was shooting these from a boat, and the loons tended to swim away from the boat, so we were constantly circling them (trying not to get too close), and I would go from side light to back light in a matter of seconds and couldn't adjust in time. Might have gotten a better photo if I were better with AE-L/AF-L, as it was I focused and metered off the birds so I got reasonable focus on the birds but the metering was a bit off for silhouettes. My edits were exposures adjustments on the birds, a curves change to make the water blue, and I "softened" the water a bit with the high pass filter.