Sea Birds. 'Flying into an uncertain future' a presentation by David Melville. David has, for most of his life, worked to ensure the needs of waders and other coastal bird, both migratory and local, are adequately looked after by councils and governments in their decision making. In recent years David has worked with Chinese authorities to stop in-filling of shorelines in the Yellow Sea where thousands of migratory birds feed on their flights to Alaska and Siberia where they breed.