As a mollusk, leech is afraid of salt, because it has no skin to protect its body, so it is very sensitive to salt. Sprinkling salt will form a kind of high-concentration brine with painful body fluids, which will make leeches shrink under pressure, and the body fluids in the pond will seep out, leading to dehydration and death of leeches.

If you are bitten by a leech in the wild or in the wild, don't pull it with your bare hands, which will easily cause some tissues to stay in the skin and cause wound infection.

Living environment of leeches

Living in paddy fields, ditches, shallow polluted ponds and other places, I like to suck human blood and animal blood, and my movements are very agile. I can swim in the waves and move inchworms. Warm spring is active every year, and the spawning period is from June to 10. In winter, I often crouch in the wet mud on the shore, and I have strong viability.

Life habit: Leech is a cold-blooded annelid, which can grow and breed in the north and south of China. Reservoirs, ditches, paddy fields and lakes that mainly live in fresh water are mostly ponds rich in organic matter or pollution-free rivers. The optimum temperature for growth is 10-40℃, when it is lower than 3℃ in the north, it will enter a dormant period in the soil, and it will sting when it is higher than 8℃ in March-April of the following year.