Even though I use my camera on mute when trying to catch birds in the lens, my feathered friends many times turn their heads in my direction when the camera silently clicks. I cannot hear what they apparently do hear, for their expressions seem to confirm it.
A week, or so, ago, I finally had a Skimmer so close above me that I could set my camera to Portrait to snap his photograph with my SX410 IS Canon. I was pretty happy with the detail I was able to capture at this setting.
Skimmers are so delightful to watch. They literally dive-bomb to the water and skim the surface to catch small fish on the fly, snatching them up and away and swallowing them before their legs are barely out of the water.