Rio Grande Valley Butterfly and Lepidoptera Links
- Directory that offers websites concerning butterflies in the southern Texas area.
- http://www.thedauphins.net/butterflylinks.html

All-Leps: Barcode of Life
- An effort that employs DNA barcoding to advance the identification and discovery of Lepidoptera.
- http://www.lepbarcoding.org/

Lepidopterology.com
- Butterfly and moth news, glossary, directory, electronic museum, and almanac.
- http://www.lepidopterology.com/

Lepidopterists' Society
- An international society devoted to the study and appreciation of butterflies and moths. Site includes membership data, publications, and identification aids.
- http://facweb.furman.edu/~snyderjohn/lepsoc/

Lepidoptera Listserver
- Service for facilitating communication among those sharing an interest in the species. Based at Yale University in New Haven, Connecticut.
- http://www.peabody.yale.edu/collections/ent/ent_LEPS.html

Lepidopterological Society of Finland
- Offers contact data, library catalog and abstracts of their journal, Baptria. Based in Helsinki.
- http://www.perhostutkijainseura.fi/english.html

Societas Europaea Lepidopterologica
- European society for the study and conservation of moths and butterflies. Features council data, projects and links.
- http://www.soceurlep.org/

Study Group of Hessian Lepidopterologists
- German volunteer cooperation supported by the International Entomological Society. Membership data and images.
- http://www.arge-helep.de/English-Abstract.html

Sicilian Lepidopterological Association
- Deals with order Lepidoptera, in all aspects including news, articles, images and related events.
- http://web.tiscali.it/ales_sicilia/indexeng.htm

Alberta Lepidopterists' Guild
- Amateur and professional lepidopterists that support the study and appreciation of the species in Alberta, Canada.
- http://www.biology.ualberta.ca/old_site/uasm/alg/

Caterpillars
- Images and information on the biology of caterpillars in the Costa Rican and Ecuadorian regions.
- http://www.tulane.edu/~ldyer/lsacat/

TILS Leps Talk
- E-mail discussion group that covers of all species related topics. Sponsored by the International Lepidoptera Survey. Offers images and links.
- http://groups.yahoo.com/group/TILS-leps-talk/

Lepidopterological Society of Japan
- Information about the club and its activities. Viewable in both Japanese and English.
- http://lepi-jp.org/

Dallas County Lepidopterists' Society
- Newsletter, checklists with images, resources and hotspots. Based in Dallas, Texas.
- http://www.dallasbutterflies.com/

Hong Kong Lepidopterists' Society
- Events, regional butterflies and moths, data about the group and links to related websites.
- http://www.hkls.org/

International Lepidoptera Survey
- Organization devoted to discovering and describing new species. Includes images and lists of scientific and common names.
- http://www.tils-ttr.org/

Lepidopterological Society of Denmark
- Showcases news, articles, observations, protected species list and links. Located in Copenhagen.
- http://www.lepidoptera.dk/

Association for Tropical Lepidoptera
- Website features membership information, species data sheets, catalogs and related links.
- http://www.troplep.org/

Southern Lepidopterists' Society
- Promotes species knowledge in the southern United States. Offers news, events and identifications. Based in Florida.
- http://www.southernlepsoc.org/

Utah Lepidopterists' Society
- Showcases meeting schedule, articles, checklists, bulletin board, species data for kids and links.
- http://www.utahlepsociety.org/

Journal of Research on the Lepidoptera
- Irregularly published journal of the Lepidoptera Research Foundation. Includes archived issues from 1962-2000.
- http://www.doylegroup.harvard.edu/~carlo/JRL/jrl.html

Ohio Lepidopterists
- Features a long-term butterfly monitoring project, checklist of local butterflies, publications, programs and sales.
- http://www.ohiolepidopterists.org/