Further reading and reference   Collins Watch Guide Birds of the Countryside - Harper Collins, London, 1997 Wings Guide to British Birds - D. Couzens: Harper Collins, London, 1997 Collins Gem Birds Photoguide - J. Flegg: Harper Collins, London, 1995 Collins Nature Guide Garden Birds - Harper Collins, London, 1996 The New Birdtable Book - Tony Soper, David and Charles The AA Readers Digest Book of British Birds - Readers Digest Birds In Winter - Mare Duquet: Harper Collins, London