Lice Scalp. Human head lice inhabit only one habitat on the whole planet. The human scalp. Four top reasons that head lice like the human scalp. 1. The scalp is warm, kids scalps are even warmer than adult scalps. 2. The scalp has a steady source of food for a head louse. Head lice need blood meals every 3-4 hours. 3. The scalp is humid. Head lice dry out if not in an environment with high humidity. 4. The scalp is dark. Under all of the layers of hair, it is nice and dark and this makes head lice and their eggs (nits) more difficult for humans to see, increasing the likelihood that the lice colony will not be detected or eradicated.
Lice Scalp. Why don’t human head lice like dogs? 1. Most dogs have fur, not hair. Furthermore dogs are constantly shedding their fur. Therefore if a nit got laid on a strand of dog fur, and the dog shed that strand of fur, the nit would be too cold to mature and hatch. 2. The surface temperature of a dog is too warm for human head lice. A dog’s body temperature ranges from 101 to 102.5 degrees Faherenheit. Whereas humans have a body temperature of 98.6 degrees Faherenheit. 3. Dogs don’t regularly curl up together in a pile in order to allow head lice to travel from one scalp to another. Most dogs in our culture are solo pets and do not cuddle with other dogs. Whereas in human culture in 2016, our children curl up together to watch a movie on Mom’s ipad. If our kid’s scalps are in prolonged contact, the head lice will happily walk right over to their new host.