— The circle unites people studying insects, spiders, and other terrestrial and freshwater arthropods.
— This study group is a volunteer cooperation (by amateur as well as professional entomologists) on the moth and butterfly fauna of the federal state of Hesse, Germany.
— A former chapter of NABA.
— A non-profit scientific society and educational membership organisation, founded in 1989 to promote the study and conservation of Lepidoptera worldwide, especially in the tropical regions of the world. ATL publishes two full-colour scientific journals on moths and butterflies, plus Lepidoptera News.
— Founded by some amateur entomologists of the area of Perpignan, France on 27 June 1990.
— A society for both amateur and professional entomologists, and those interested in other branches of natural history. The objectives of the society are principally the promotion and advancement of research in entomology with an increasing emphasis now being placed on the conservation of the fauna and flora of the United Kingdom and the protection of wildlife throughout the world.
— The home page of The Israeli Lepidopterists Society.
— A British charity devoted to saving butterflies, moths and their habitats.
— Promotes public awareness and appreciation of Lepidotera (moths and butterflies), to locate, inventory, create, and encourage preservation of butterfly habitats, and to help people understand the effects of habitat loss, pesticide use, and degradation of butterfly populations.
— Emphasises identifying and watching butterflies in the field and garden rather than collecting them.