Community identification
Human Head Louse
Pediculus humanus capitis
- Order & Family
- Order: Psocodea (formerly Phthiraptera); Family: Pediculidae
- Size
- 2.0 mm to 3.0 mm (roughly the size of a sesame seed)
Natural Habitat
The scalp and hair of human beings, primarily residing close to the warm skin surface.
Diet & Feeding
Obligate ectoparasite; feeds exclusively on human blood several times a day.
Behavior Patterns
Wingless and incapable of hopping or flying; they move by crawling. Females lay eggs (nits) glued to the hair shafts near the scalp. They cannot survive for more than 24-48 hours off a human host.
Risks & Benefits
Risk: Causes intense itching (pediculosis) due to allergic reactions to saliva, and potential secondary skin infections from scratching. Benefit: None; they are considered a nuisance pest and a health burden.