Head Lice (Pediculus Humanus Capitis)
Head lice are wingless insects spending their entire life on the human scalp and feeding exclusively on human blood. Head-to-head contact is by far the most common route of lice transmission.
About Human Head Lice
Adult head lice are roughly 2—3 mm long. Head lice infest the head and neck and attach their eggs to the base of the hair shaft. Lice move by crawling; they cannot hop or fly.
Head lice infestation, or pediculosis, is spread most commonly by close person-to-person contact. Dogs, cats, and other pets do not play a role in the transmission of human lice. CDC – Centers for Disease Control and Prevention