Louse (Head, Body, or Crab)

Exclusively on the human body, specifically hair shafts, clothing fibers, or pubic regions, depending on the species.

Obligate hematophagous parasites that feed on human blood several times a day.

Wingless insects that move by crawling. They attach their eggs (nits) to hair shafts or clothing fibers with a specialized glue-like substance. They cannot jump or fly.

Risks include intense itching, skin irritation, and secondary bacterial infections from scratching. Body lice can transmit serious diseases like epidemic typhus. There are no known ecosystem benefits.