This is the second, completely revised and enlarged edition of an outstanding, interactive CD-ROM describing and illustrating in full colour 447 European bird species. It contains sound records and colour pictures of all the birds, pictures of the eggs, and attractive interactive summer and winter distribution maps. Detailed descriptions, a pictorial field guide for identification, a quiz testing the user's knowledge and a glossary defining over 500 scientific terms make this CD-ROM a treasure box for everybody. The new edition contains many additional species, (mainly from Eastern Europe) as well as a newly developed habitat key.