- Amateur Entomologist - - Butterfly and moth specimens for exchange, butterfly picture galleries, entomological expedition to French Guyana, butterfly preservation, and links. In English and French.
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- Atropos - - Publication for butterfly, moth, and dragonfly enthusiasts in the British Isles. Insect migration, conservation, and field techniques are central themes.
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- Butterflies and Moths - - Notes on the biology and ecology of butterflies and moths, with some photographs by Jeroen Voogd.
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- Butterflies and Moths of North America - - A guide to the Lepidoptera of the United States and northern Mexico, including a photographic identification guide, county checklists, and distribution maps.
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- Caterpillar Hostplants Database - - This is a Natural History Museum project to create a searchable database of information linking caterpillars to their host plants.
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- Caterpillars of Eastern Forests - - Species descriptions, life cycle, morphology, and tips on photographing, rearing, collecting, and preserving specimens of caterpillars occurring in forests of the eastern United States.
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- Caterpillars of the Pacific Northwest - - A field guide to caterpillars commonly found in forests and woodlands of the Pacific Northwest, USA, including sections on natural history, nomenclature, identification keys, and a guide to collection and preservation of specimens.
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- David Bell's Butterflies and Moths - - Butterflies and moths of central Ontario, Canada. Observation techniques, mimicry, life cycles, changing distribution, photos, and links.
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- European Butterflies and Moths - - Photo gallery of butterflies and moths sorted by English name, scientific name, family, or country. In Polish, English, and German.
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- Georgia Lepidoptera - - Photographs and species lists of the moths and butterflies of Georgia and the southeastern United States. Includes helpful hints for beginners, references, and links.
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- Lepidoptera Larvae of Australia - - Images and descriptions of biology, behavior, and life histories of 1238 Australian Lepidoptera species. Includes 462 caterpillar photos.
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- Lepidoptera of Southeastern Arizona - - Detailed information from the Arizona Lepidoptera Survey on the butterflies and moths of southeastern Arizona and Sonora, Mexico. Includes many images of dead specimens and live caterpillars.
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- Lepidoptera.Net - - Photographs and information about almost all of the common species of butterflies in Georgia, USA with some photos of butterflies and moths from around the world.
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- LepIndex - Global Lepidoptera Names Index - - An online, updated version of The Natural History Museum's card index archive to the scientific names of the living and fossil butterflies and moths (Lepidoptera) of the world.
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- Markku Savela's Lepidoptera - - Taxonomic tree including common and scientific names, publication details, references, links, general range maps, and some images.
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- Order Lepidoptera - - Taxonomy and species accounts of moths and butterflies from the Animal Diversity Web.
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- Oz's Insect World - - Information about the butterflies of Israel and Saturnids of the World. Includes photos of specimens and some Israeli Coleoptera.
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- Papiliopola - - Photographs of over 80 species of butterflies and moths from around the world.
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- Russian Lepidoptera - - Information on hundreds of species of butterflies occurring in the former USSR, including type locality, synonyms, range, distribution and variation, taxonomic notes, habitat and biology, similar species, and photos of museum specimens.
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- UK Butterflies and Moths - - An online collection database with specimen images and details from the Natural History Museum.
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- The UK Butterfly Monitoring Scheme - - This scheme is monitoring changes in the abundance of British butterflies and has produced important insights into almost all aspects of butterfly ecology.
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- UK-Leps - - Forum for discussion of Lepidoptera of the British Isles.
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