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Fleas belong to the insect order Siphonaptera, a group of wingless, sucking insects with legs modified for jumping. All are parasitic on mammals or birds.
Featured Creatures: The Cat Flea
The cat flea is distributed throughout North America, whereas the dog flea is more common in Europe. Read here about the cat flea's life cycle and description, and how to control them.
Gordon's Flea Page
Flea biology, fleas and man, and flea folklore.
Introduction to the Siphonaptera
A brief introduction to fleas, with a discussion of fleas in the fossil record.
Siphonaptera
Classification, life history and ecology, distribution, anatomy, and taxonomy of the flea, with a file of interesting flea facts.

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