Nature's Calendar - Series 1 - Autumn: Estuaries

Documentary series. A guide to the best places in Britain to see wildlife in autumn. Sanjida O'Connell visits Cornwall to discover the joys of rockpooling, as well as visit a sanctuary where autumn sees an influx of wild baby seals. Chris Packham is in Northern Ireland for the swan and goose migration. And Mike Dilger meets one of Britain's 'super-birders' at the Dee Estuary.