I've come back to this one, as it has been on my mind - sign of a good photo. The square format is perfect here, and the horizontal lines of the waves, mixed in with some lines parallel to the big pipe, and the tones moving from red to black across the frame, again parallel to the pipe - it's all set up for something interesting to happen. And it does. The birds are in three poses, flowing from still to sun salutation - wonderful. Well done, maestro!