Head Louse

Human scalp and hair, most commonly found behind the ears and near the neckline at the back of the head.

Obligate ectoparasites that feed exclusively on human blood several times a day.

They are wingless and cannot jump or fly; they move by crawling. They attach their eggs (nits) to the base of hair shafts with a waterproof glue-like substance.

While they do not transmit bacterial or viral diseases, they cause intense itching (pruritus) and scalp irritation. Secondary skin infections can occur from scratching. They provide no ecosystem benefits.