Our colleagues in the Cornwall Birdwatching & Preservation Society (CBWPS) have started a "Daily sightings" page this year and Marazion Marsh usually heads the list every day (as it should!). The website is updated every evening so if you are heading to west Cornwall you can always find out what has been seen up until the day before by simply clicking the 'County Bird News' link:
http://www.cbwps.org.uk/bird_news1.htm
Good birding!
Dave Flumm
Site Manager, Cornwall reserves