Sitting down outside at Cafe 1919 by the harbour in Puerto Pollensa, I watch one of the world’s rarest gulls drifting by overhead, and landing on the soft, glistening sand of the nearby beach. It was 1990, during my first ever visit to Mallorca. Just out on the exposed rocks sit Sandwich Terns and several Shag, with Yellow-legged Gulls noisily keeping them company. I am in my element, sipping a beautiful coffee after a morning’s bird watching, and watching probably the rarest gull I will ever see. I would like to see them a bit closer, so noticing they were spending a lot of time along the beach, I went for a closer look.