What is the life span of head louse?
The life cycle of head lice is very small, approximately 40 days in total. There entire life cycle is divided in three phases, i.e. nits, nymphs and adults. Nits are somewhat off-white in color and these are eggs which are laid by female head louse. Nits are very difficult to be identified as they are very small and can be often confused as dandruff. Once nits are layed, it takes around a weeks time for these nits to hatch. After hatching, they lice are undeveloped and immature and are called nymphs. The life cycle of nymphs is approximately a week, but they are mature enough to suck blood during this period. After a week, these nymphs are developed in a fully grown adult head lice. They have six legs with claws which they use to hold the hair firmly to avoid falling from the head. An adult head lose lives nearly 30 days on a human head if it is lucky. If it falls from a human head, it will hardly survive for 48 hours if it fails to find another human host as it survives only on human
