Flea eggs are laid in dirt or in the nest of the host; the whitish larvae feed on organic matter and the feces of adult fleas. The larvae spin cocoons as part of the metamorphosis into adults. Many species can live on more than one host species. Adults can feed for several weeks without feeding.
Fleas cause irritation and some carry diseases. The rat flea (Xenopsylla cheopsis), for instance, can transmit typhus and bubonic plague to humans. Length: 1 cm (0.4 in).
Related category• ZOOLOGY
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