"Pediculus humanus humanus" (the body louse) is indistinguishable in appearance from "Pediculus humanus capitis" (the head louse) but will interbreed under laboratory conditions. In their natural state, the two lice sub-species occupy different habitats and do not usually meet. They can feed up to five times a day and as adults can live for about thirty days, but if they are separated from their host, they will die within a week. If the conditions are favorable, the body louse can reproduce rapidly. After the final molt, female and male lice will mate immediately. A female louse can lay up to 200-300 eggs her life.