Hardcover with dust jacket in very good condition. Minor bumped corners. Special articles by Dr. E. L. Jones, L. R. Lewis, Dr. C.M. Perrins and Raymond Smith deal with the historical background and distinguishing characteristics of three areas- Lambourne Downs, Kennet Downs and Windsor Great Park, which are representative of the main types of habitat within the region. Two hundred and eighty six species are included in the exhaustive systematic list.