Louse (specifically Nits/Head Lice)

Scientific Name: Pediculus humanus capitis

Order & Family: Order: Psocodea (formerly Phthiraptera), Family: Pediculidae

Size: Nymphs and adults are 2–3 mm long; eggs (nits) are approximately 0.8 mm

Louse (specifically Nits/Head Lice)

Natural Habitat

Exclusively on the human scalp and hair

Diet & Feeding

Obligate parasites that feed exclusively on human blood several times a day

Behavior Patterns

They cannot jump or fly; they move by crawling via hair-to-hair contact. Females glue oval eggs (nits) to the base of hair shafts near the scalp.

Risks & Benefits

Risks include intense itching, scalp irritation, and potential secondary bacterial skin infections from scratching. They are not known to transmit diseases.

Identified on: 1/12/2026