Human Head Louse
Scientific Name: Pediculus humanus capitis
Order & Family: Order: Psocodea, Family: Pediculidae
Size: 2 mm to 3 mm (about the size of a sesame seed)
Natural Habitat
The scalp and hair of humans, typically concentrated near the neck and behind the ears.
Diet & Feeding
Obligate blood feeders, consuming small amounts of human blood several times a day.
Behavior Patterns
They are wingless and cannot jump or fly; they move by crawling. They glue their eggs (nits) to hair shafts and live for about 30 days on a host.
Risks & Benefits
They cause itching and skin irritation due to an allergic reaction to their saliva. They do not transmit diseases, though secondary skin infections can occur from scratching.
Identified on: 6/3/2026