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Head louse egg (nit) attached to hair shaft of host. Like most insects, head lice are oviparous. Females lay about three or four eggs per day. Louse eggs (also known as nits), are attached near the base of a host hair shaft. [11] [12] Eggs are usually laid on the base of the hair, 3–5 mm off the scalp surface.
A louse's egg is commonly called a nit. Many lice attach their eggs to their hosts' hair with specialized saliva; the saliva/hair bond is very difficult to sever without specialized products. Lice inhabiting birds, however, may simply leave their eggs in parts of the body inaccessible to preening, such as the interior of feather shafts.
Documented Nahuatl words in the Spanish language (mostly as spoken in Mexico and Mesoamerica), also called Nahuatlismos include an extensive list of words that represent (i) animals, (ii) plants, fruit and vegetables, (iii) foods and beverages, and (iv) domestic appliances. Many of these words end with the absolutive suffix "-tl" in Nahuatl.
The amber eggs are deposited on the lower half of the swine's side, or the neck, shoulders, flanks, or on the back of the ears. Lice eggs are commonly referred to as "nits". [Note 1] These nits have small holes for gas exchange, called opercula. Typically, eggs will hatch within 12–14 days, but this varies depending on temperature. [4]
Hippoboscidae, the louse flies or keds, are obligate parasites of mammals and birds. In this family , the winged species can fly at least reasonably well, though others with vestigial or no wings are flightless and highly apomorphic .
Pubic lice (Pthirus pubis) have three stages: the egg (also called a nit), the nymph, and the adult. They can be hard to see and are found firmly attached to the hair shaft. They are oval and usually yellow to white. Pubic lice nits take about 6–10 days to hatch. The nymph is an immature louse that hatches from the nit (egg).
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Head lice are spread through direct head-to-head contact with an infested person. From each egg or "nit" may hatch one nymph that will grow and develop to the adult louse. Lice feed on blood once or more often each day by piercing the skin with their tiny needle-like mouthparts.