Something very interesting under the surface

On the way up to Speyside for a week's holiday we stopped over at Stirling, and stayed at the University. Bit of a nostalgia trip, as I was there for a year 1990-91. The University grounds are beautiful, and the campus has its own loch, with a footbridge over it. This photo was taken from the bridge. There were quite a few swans, and they seemed to be quite preoccupied with what was under the surface. I was struck by the unusual sight of looking down on them from above!