An Introduction There are over 2,200 known species of fleas in the world. They are metamorphic, wingless arthropods that feed on mammals and birds.
Fleas are very democratic and enjoy sucking the blood of a wide variety of hosts.
Pulex simulans Human fleas Pulex irritans Of these, the most common are cat fleas which are found on cats, dogs, humans and possibly more than 50 other species of animals including ferrets, racoons and opossums. No house, car, pet or human should have fleas. A single, visible flea can be a sign of a current or impending infestation. A breeding pair of fleas can lay more than 500 eggs in a month. Their offspring can remain dormant for two years before they become mature fleas.