Adult fleas are flattened from side to side, dark colored, wingless and have strongly developed legs. Their hind pair of legs are especially adapted for jumping. They have sucking mouthparts used to siphon out the blood of animals. Larvae are worm-like, legless and tan. They feed on organic debris, dried blood and excrement from adult fleas. Fleas usually bite humans where clothing fits tightly against the body. Adult fleas can live for several weeks without a blood meal. When found indoors, they are usually associated with pet dogs or cats. Fleas can transmit several diseases including bubonic plague and tularemia. They are also the carriers of a tapeworm which, in the adult stage, is found in dogs and men.