Arctic Terns on Pond - Grimsey Island, Iceland
Nikon D500, 500mm f/4.0e, 1/2000sec, at f/4.5, ISO 400
I saw a large flock of Arctic Terns repeatedly splashing around in a little pond then taking off, and coming right back. The strong wind made the birds follow a very predictable path. When I first approached, I didn't have any idea what I wanted until I shot several frames. That's when I visualized a very low angle shot--just above the water--with the background as out of focus as possible.
Since shooting this way next to the pond was so uncomfortable, I didn't really frame the shot. I mostly pointed the camera towards the birds without looking through the view-finder and fired away when the birds took off. Fortunately, there were lots of opportunities that eventually led to this image.
While I did compose for blurred background, the symmetry of multiple birds was not planned. It was a gift which seems to happen a lot with nature photography.