Butterflies of the Monts du Lyonnais
- Information about species flying on the hillsides of the Rhône département, France.
- http://perso.orange.fr/felixthecatalog.tim/

Upper Thames Branch of Butterfly Conservation
- Serves Bucks, Berks, and Oxfordshire, England. News, field trips, sightings, photographs, and flight data.
- http://www.upperthamesbutterflies.co.uk/

Butterflies of the Netherlands
- Checklist and photographs by Christine Corver.
- http://www.leps.nl/Checklist_butterflies.php

Butterflies of Northamptonshire
- Annotated list of 37 species, with photos of most.
- http://www.northamptonshirewildlife.co.uk/wildlife/butterflies.htm

ImagineButterflies.dk
- Photo gallery of butterflies from various parts of Europe by Jakob Arnholtz.
- http://imaginebutterflies.dk/

UK Butterflies
- Photographs, food plants, and flight charts of all species regularly found in the United Kingdom.
- http://www.ukbutterflies.co.uk/

Dutch Butterfly Conservation
- A Dutch non-profit organization which works for the conservation of wild butterflies and their habitats.
- http://www.vlinderstichting.nl/category.asp?catID=14

Garden Safari: Butterflies
- Photographs and notes on common butterflies in a garden in the Netherlands.
- http://www.gardensafari.net/english/butterflies.htm

Butterflies of Catalonia
- Species list and flight charts. Includes sections on butterflies of Andorra and wasps of Catalonia.
- http://www.papallones.net/papallones/

LepsEurope
- E-mail group for discussion of butterflies and moths in Europe.
- http://groups.yahoo.com/group/LepsEurope/

Bedfordshire & Northamptonshire Butterfly Conservation
- Features sightings, pictures and lepidoptery news. Includes upcoming events and newsletters.
- http://www.bedfordshire-butterflies.org.uk/

Matt's European Butterflies
- Features photos of many rare and unusual European butterflies. Personal observations and comments on all species are included.
- http://www.eurobutterflies.com

Pictures of Dutch Butterflies
- Small photo gallery of butterflies in the Netherlands.
- http://www.xs4all.nl/~kite/digiscopics/butterflies/

British Butterflies
- Photographs and descriptions of British butterflies by Steven Cheshire.
- http://www.britishbutterflies.co.uk/

Derbyshire Butterflies
- Photos of butterflies in Derbyshire, UK by Mark Nowak.
- http://www.marknowak.co.uk/

Butterfly Ireland
- Photographs of Ireland's butterflies, with many photographs of eggs, pupae, and larvae. Also includes flight charts, distribution maps, sightings, and links.
- http://www.butterflyireland.com/

Yorkshire Butterfly Conservation
- Field trips, flight times, photographs, and other resources.
- http://www.yorkshirebutterflies.org.uk/

Sarah Walters - Butterflies
- Photographs of British butterflies.
- http://www.docsarah.demon.co.uk/butterflies.htm

Moths and Butterflies of Europe
- A large photo gallery of European moths and butterflies, including larvae and pupae.
- http://www.leps.it/

Guy Padfield's European Butterflies
- Pictures of over 150 European species of butterfly, with butterfly diary, schools' page, and links.
- http://www.guypadfield.com/

Captain's European Butterfly Guide
- Photographic guide to the butterfly species of Europe.
- http://www.butterfly-guide.co.uk/

Butterflies of Ireland
- Guide to the butterflies of Ireland, with photographs of most species and a guide to indoor tropical butterfly houses.
- http://www.irishbutterflies.com/

British Butterfly Conservation Society
- Dedicated to saving wild butterflies, moths and their habitats throughout the UK.
- http://www.butterfly-conservation.org/