Today I saw two swans flying over a white snow-covered field. I didn’t get a picture as I was on a train and they would in any case have been tiny white dots in the shot. However it isn’t difficult for you to imagine the scene and mentally appreciate the art of it. A few dark hedgerows and trees criss-cross the vision but mostly it is gleaming white and the magnificent pair of birds are an interesting dynamic – the only moving part of the picture..