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What kind of insect is this? Is it harmful to humans?

This bug damages books and clothing.

In the warmer and humid regions and environments in southern my country, most of those who have a few thread-bound books hidden at home should be familiar with silverfish. Sometimes they can be seen alive, hiding in books and living day and night like beetles, destroying tens of thousands of books. Some of them have already gone away and never come back, leaving the book empty.

Silverfish is also known as whitebait and silverfish. It is a nocturnal insect that likes to live in dark and moist places. It has a slender and soft body with two long head whiskers and three tail whiskers. It has a thick head and thin tail, a fish-like body shape, and silver-gray fine scales. The adult insect is about 2 cm. It lives in the piles of old books and paper, and its favorite thing is to eat the paste smeared when binding and mounting old books. It has sharp teeth, good climbing legs, and moves quickly. Moreover, the body development is scientific and reasonable. As long as its head can pass, the trunk can definitely pass. In this way, they eat and live in the tunnels created by their own food. No matter how high or thick your stack of books is, or whether you are the "Four Books and Five Classics" or the "Tang Dynasty Theory", they will just eat all the way. past. Due to its natural photophobia, once it almost bites the surface of the stack of books, it turns back and continues to bite deeply in the opposite direction. This cycle goes on and on, eating up thin, long, winding tunnels among a large pile of books. It can be said that life is endless and digging holes is endless. In addition to thread-bound old books, all framed calligraphy and painting scrolls and albums require paste in the production process, so they often cannot escape the predators.