Head Louse (Nits)
Scientific Name: Pediculus humanus capitis
Order & Family: Order: Psocodea, Family: Pediculidae
Size: Nits are 0.8 mm long; adults are 2-3 mm long
Natural Habitat
Human scalp and hair, specifically close to the skin surface for warmth
Diet & Feeding
Obligate ectoparasites that feed exclusively on human blood several times a day
Behavior Patterns
Females lay eggs (nits) at the base of hair shafts using a glue-like substance; they cannot fly or jump and spread through direct head-to-head contact
Risks & Benefits
Causes intense itching and scalp irritation; they do not transmit diseases but can lead to secondary skin infections from scratching
Identified on: 1/11/2026