Head Louse

Natural Habitat

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

Diet & Feeding

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

Behavior Patterns

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.

Risks & Benefits

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.

Identified on: 3/12/2026