I saw you last night

I was in Poland on a frozen deck, facing the ocean melted with the dark sky into a deep black screen at night. I took my camera and shot. And then one small white stain appeared on the black screen, waving slowly to me. I shot. The small stain became two stains. I shot. The two stains became a creepy army of stains. I shot.
It was swans, attracted by the flash of my camera.