However, the incidence of fleas in households with pets is undoubtedly greater, and not only their pets can bring home the unpleasant insects.The fleas are 1-4 mm dark brown, insect-free insects. The bodies are flattened on the side, the heads are small, and their lips are dry and bloody. The heart is made up of the upper jaw and upper lip, and the lower jaw is made up of skin and is intended for skin repair. The backs of the pairs of legs are powerful jumps, allowing for huge jumps in body size. About 2,000 species are known in the world, 82 of which have been described in Hungary until 1992. The human bee is red or dark brown, almost black in color and 0.2-0.4 cm long. On the side of the head, the other fleas are lacking, with hard chitinous teeth, "fleshy", their eyes are relatively large, and their feet are heavily bruised. It can jump up to 35 centimeters and up to 20 centimeters high, up to 100 times its own length.