Siphonaptera (fleas)
- 3-D Insects - Virtual models of insects using the virtual reality modeling language.
- Australian Faunal Directory - checklists and bibliographies for Australian insects
- Carnegie Museum of Natural History - 6.9 million specimens
- Flea News - from Iowa State University
- Fleas - (Siphonaptera) taxonomy, morphology, distribution, host-association and ecology, scanning electron micrographs. Hosted by Zoological Institute (St. Petersburg, Russia)
- Fleas of North Dakota - includes distribution maps
- Fleas of South Africa - compiled by Joyce Segerman
- Fleas, Ticks and Your Pet FAQ - from the rec.pets.* UseNet newsgroup
- MicroAngela - scanning electron microscope images of insects
- Siphonaptera - Tree of Life
- Society for Vector Ecology
- Veterinary Entomology - biological information on various insect parasites of animals and to some extent humans. Tsetse flies, tabanids, screwworm, fleas and cockroaches
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