The answer to 'what is flea' is a small, wingless insect that is a common household pest. Fleas are parasitic insects that feed on the blood of humans, pets, and other warm-blooded animals. They are known for their ability to jump long distances and can quickly infest a home or pet, causing irritation, discomfort, and potentially transmitting diseases.
Fleas are typically brown or black in color and have a flattened, oval-shaped body. They have powerful hind legs that allow them to jump up to 13 inches vertically and 8 inches horizontally. Fleas are attracted to the warmth and carbon dioxide emitted by their hosts, and they can quickly reproduce, laying up to 50 eggs per day.