Last Friday a single Ring Ouzel was found at Canons Farm in Surrey. On Saturday morning it was joined by a second bird. Yesterday there were no fewer than four of them to be seen throughout the day. It is unlikely that all four had been present since Friday as the very open area had been birded heavily on all three days. I think it's likely that the additional birds were called down by the vocal nature of this species. I could hear a 'chack' from several hundred meters distance. How many others flew overhead and did not stop?
Other well-birded local sites, such as Beddington and Holmethorpe do not regularly get Ring Ouzels. In the fledgling history of birding at Canons Farm it seems likely that a small spring passage may be the norm. There are other inland sites that seem to attract this species - Blow's Down in Bedfordshire springs to mind. If so, why? Fly lines? Magnetic fields? I'd love to know.