Terns and Number 6

There was a tremendous commotion in the harbour this evening when I passed. All the terns were flying around and diving all over the place. It looked like a feeding frenzy and I wondered if this was preparation for their imminent migration or just a lucky find.
I liked the balance in this image. The tern on the left has a small fish and the one on the right has a classic pose.
Number 6 is the last of Antony Gormley's series of statues along the Water of Leith.