Appearance: Black to brownish-black, about one-twelfth to one-sixteenth inch long; six legs, with many bristles on body and legs; flattened body.

Habits: Found on cats and dogs year-round, but most common during warm and humid weather; readily attack and feed on humans; can jump as much as seven-eighth inch vertically, and 14 to 16 inches horizontally.

Diet: Blood

Reproduction: Female can lay about 25 eggs a day, and up to 800 eggs during her lifetime; fleas undergo complete metamorphosis, usually in 14 to 90 days.

Other Information: Carrier of many diseases; adults can live one to two months without feeding.