| Alberta Lepidopterists' Guild: Amateur and professional lepidopterists that support the study and appreciation of the species in Alberta, Canada. |
| All-Leps: Barcode of Life: An effort that employs DNA barcoding to advance the identification and discovery of Lepidoptera. |
| Association for Tropical Lepidoptera: Website features membership information, species data sheets, catalogs and related links. |
| Caterpillars: Images and information on the biology of caterpillars in the Costa Rican and Ecuadorian regions. |
| Dallas County Lepidopterists' Society: Newsletter, checklists with images, resources and hotspots. Based in Dallas, Texas. |
| Hong Kong Lepidopterists' Society: Events, regional butterflies and moths, data about the group and links to related websites. |
| International Lepidoptera Survey: Organization devoted to discovering and describing new species. Includes images and lists of scientific and common names. |
| Israeli Lepidopterists Society: Data on butterflies and hawkmoths found within the region as well as a searchable database and photographs. |
| Journal of Research on the Lepidoptera: Irregularly published journal of the Lepidoptera Research Foundation. Includes archived issues from 1962-2000. |
| Lepidoptera Listserver: Service for facilitating communication among those sharing an interest in the species. Based at Yale University in New Haven, Connecticut. |
| Lepidopterists' Society: An international society devoted to the study and appreciation of butterflies and moths. Site includes membership data, publications, and identification aids. |
| Lepidopterological Society of Denmark: Showcases news, articles, observations, protected species list and links. Located in Copenhagen. |
| Lepidopterological Society of Finland: Offers contact data, library catalog and abstracts of their journal, Baptria. Based in Helsinki. |
| Lepidopterological Society of Japan: Information about the club and its activities. Viewable in both Japanese and English. |
| Lepidopterology.com: Butterfly and moth news, glossary, directory, electronic museum, and almanac. |
| Ohio Lepidopterists: Features a long-term butterfly monitoring project, checklist of local butterflies, publications, programs and sales. |
| Parisian Lepidopterists: Website includes published research in the species field, list of meetings and excursions and photograph gallery. |
| Rio Grande Valley Butterfly and Lepidoptera Links: Directory that offers websites concerning butterflies in the southern Texas area. |
| Sicilian Lepidopterological Association: Deals with order Lepidoptera, in all aspects including news, articles, images and related events. |
| Societas Europaea Lepidopterologica: European society for the study and conservation of moths and butterflies. Features council data, projects and links. |
| Southern Lepidopterists' Society: Promotes species knowledge in the southern United States. Offers news, events and identifications. Based in Florida. |
| Study Group of Hessian Lepidopterologists: German volunteer cooperation supported by the International Entomological Society. Membership data and images. |
| TILS Leps Talk: E-mail discussion group that covers of all species related topics. Sponsored by the International Lepidoptera Survey. Offers images and links. |
| Utah Lepidopterists' Society: Showcases meeting schedule, articles, checklists, bulletin board, species data for kids and links. |
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