Alexanor's Ukrainian Butterflies: List of species with scientific and common names, distribution maps, photos, statistics, and databases.
Bedfordshire & Northamptonshire Butterfly Conservation: Features sightings, pictures and lepidoptery news. Includes upcoming events and newsletters.
British Butterflies: Photographs and descriptions of British butterflies by Steven Cheshire.
British Butterfly Conservation Society: Dedicated to saving wild butterflies, moths and their habitats throughout the UK.
Butterflies in Europe: Photos, trip reports, and links.
Butterflies of Catalonia: Species list and flight charts. Includes sections on butterflies of Andorra and wasps of Catalonia.
Butterflies of Gloucestershire: A guide to the butterflies of Gloucestershire, UK, with photographs, distribution maps, and conservation status for each species.
Butterflies of Ireland: Guide to the butterflies of Ireland, with photographs of most species and a guide to indoor tropical butterfly houses.
Butterflies of Northamptonshire: Annotated list of 37 species, with photos of most.
Butterflies of the Monts du Lyonnais: Information about species flying on the hillsides of the Rhône département, France.
Butterflies of the Netherlands: Checklist and photographs by Christine Corver.
Butterfly Conservation - Kent Branch: Includes photos, first sightings, newsletters, information about White Hill Reserve, events and contact information. Located in the UK.
Butterfly Info: Information on European butterflies, including photo galleries, poems and lyrics, literature, and a list of good butterfly spots.
Butterfly Ireland: Photographs of Ireland's butterflies, with many photographs of eggs, pupae, and larvae. Also includes flight charts, distribution maps, sightings, and links.
Captain's European Butterfly Guide: Photographic guide to the butterfly species of Europe.
Derbyshire Butterflies: Photos of butterflies in Derbyshire, UK by Mark Nowak.
Dutch Butterfly Conservation: A Dutch non-profit organization which works for the conservation of wild butterflies and their habitats.
European Butterflies by Mario Maier: Photos and descriptions of many species. In German and English.
Garden Safari: Butterflies: Photographs and notes on common butterflies in a garden in the Netherlands.
Guy Padfield's European Butterflies: Pictures of over 150 European species of butterfly, with butterfly diary, schools' page, and links.
ImagineButterflies.dk: Photo gallery of butterflies from various parts of Europe by Jakob Arnholtz.
LepsEurope: E-mail group for discussion of butterflies and moths in Europe.
Matt's European Butterflies: Features photos of many rare and unusual European butterflies. Personal observations and comments on all species are included.
Moths and Butterflies of Europe: A large photo gallery of European moths and butterflies, including larvae and pupae.
Pictures of Dutch Butterflies: Small photo gallery of butterflies in the Netherlands.
Sarah Walters - Butterflies: Photographs of British butterflies.
UK Butterflies: Photographs, food plants, and flight charts of all species regularly found in the United Kingdom.
Upper Thames Branch of Butterfly Conservation: Serves Bucks, Berks, and Oxfordshire, England. News, field trips, sightings, photographs, and flight data.
Yorkshire Butterfly Conservation: Field trips, flight times, photographs, and other resources.