Europe
| Butterflies of Genus Euphydryas |
| The Natural History Museum of United Kindom |
| The Dutch Butterfly WWW Page |
| Swedish Lepidoptera Homepage |
| British Butterfly Conservation |
| British Butterflies |
| Captain's European Butterfly Guide |
| Belgian Migrating Lepidoptera |
| Lepidopterological Society, Copenhagen, Denmark |
| Lepidoptera of Finland (and other holarctic lepidoptera) |
| Butterfly and Moth News: Finland |
| Butterflies of Germany and Austria |
| Schmetterlinge: Butterflies of Germany |
| Butterflies of Poland (database) |
| Lepidoptera of the Former Soviet Union: Lasiocampidae |
| Lepidoptera of the Former Soviet Union:Arctiidae |
| Ethmiidae |
| See also Lepidoptera of the Siberian Zoology Museum |
| Butterflies of The Ukraine |
| Butterflies of Russia |
| Moths and Butterflies of Europe |
Latin America (including Caribbean Islands)
| A Students' Guide to Butterflies (Anatomy, Functions, Life Cycle, etc.) |
| French Antilles Lepidoptera |
| MIZA: Museo del Instituto de Zoologia Agricola (Venezuela) |
| Mariposas de Venezuela |
| Butterflies of Northern Mexico and Sonora |
| Arctiidae of French Guyana |
| Museo Mariposas del Mundo (Argentina) |
Middle East
| Butterflies and Moths of Israel |
North America
| Butterflies of North America |
| Butterflies of the United States (distribution maps, photos) |
| Butterflies of Northern Mexico and Sonora |
| Butterflies of Utah (USA) |
| Butterflies of the University of Florida Natural Area |
| Utah Lepidopterists' Society |
| Butterflies of the University of Florida Natural Area |
| Butterflies of Southeastern Arizona |
| Washington Area Butterfly Club (D. C., USA) |
| The R.B. Dominick Moth and Butterfly Collection (exclusively from coastal South Carolina, USA) |
| North Carolina Butterflies (USA) |
| Connecticut Butterfly Association (USA) |
| Connecticut (USA) Butterfly Atlas Project |
| Nectar Sources for North American Butterflies |
| Florida Native Butterfly Gardening |
| Butterflies of Quebec |
| Nectar Sources for North American Butterflies |
| Texas Gulf Coast Butterflies (checklist) |
| The NABA Butterfly Common Names List |
| Butterfly Zone, The Butterfly Gardening Connection |
| The Butterfly Web Page |
| Butterfly Net International (butterfly systematics) |
| Electronic Resources on Lepidoptera |
| Project Monarch Butterfly |
| Monarch Watch |
| Butterfly Zone (butterfly gardening) |
| Life Cycle of Heliconius charitonia |
| The Butterfly Traders' Site |
| Endangered Butterflies |
| Birdwing Butterflies of the World |
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