Fleas are parasites which feed on warm-blooded animals. The most common species of fleas is the cat flea, which can feed on cats, dogs, and humans. They are most easily identified by the numerous small itchy, red bumps their bite leaves, which will often appear more around the ankles than other locations on the body.
Fleas transport on rodents and other mammals, and will infest pets, carpets, and bedding. Fleas can jump as high as 8 inches vertically, and 16 inches horizontally.
Fleas usually remain on their warm-blooded hosts, and can be found on pant legs, shoes, and blankets, which can aid in the transfer of fleas, as well as rodents such as opossums or rats.
Fleas are known transmitters of few diseases, such as the Bubonic Plague, or murine typhus. They have also been known to cause allergic reactions, and their bite leaves red itchy bumps.