The interactive guide to Butterflies of Europe

From ETI:

This multimedia CD-ROM presents unique up-to-date information on more than 400 European butterflies. This information is not available in regular field guides. All species are presented with superb colour drawings, pictures of living butterflies, and information on distribution and flight periods. Specific butterfly habitats are described and illustrated. A novel feature in this production is the display of trend and degree of occurence in each country over the last 25 years. An easy to use interactive tool allows you to find which butterfly can be expected in a particular geographic region, habitat, and flight period. This CD-ROM, compiled by specialists from the Dutch Butterfly Conservation, is a must for all European butterfly lovers and for all visitors who take delight in these fascinating insects.