Louse Nit

Scientific Name: Pediculus humanus capitis (Egg)

Order & Family: Order: Psocodea; Family: Pediculidae

Size: Approximately 0.8 mm long, about the size of a knot in thread.

Louse Nit

Natural Habitat

Human scalp and hair, usually glued firmly to hair shafts close to the skin for warmth.

Diet & Feeding

Nits do not eat; however, once they hatch into nymphs (lice), they feed on human blood.

Behavior Patterns

The female louse lays eggs (nits) and attaches them to the hair shaft with a waterproof, glue-like substance. Eggs hatch in 8 to 9 days.

Risks & Benefits

Risks include intense itching, scalp irritation, and potential secondary skin infections from scratching. They provide no ecosystem benefits and are considered parasitic pests.

Identified on: 4/14/2026