I am always fascinated by the sight of a flock of birds flying at high altitude, especially if they adopt a V-shaped formation and display a sense of determination and knowledge of where they are going.
The pictures below do not quite fulfil all of these criteria but they do record a captivating experience. I was sitting by the shore at Agadir, Morocco, and for about two hours flight after flight of birds, often in fairly loose formation, flew from west to east along the coast. I have no idea what they were, where they had come from nor where they were going. I just know that I was witnessing a sizable if somewhat untidy migration