Now there are no leeches in the river, is it that the environment is seriously polluted and extinct

Environmental pollution and the destruction of the ecological environment may indeed reduce leeches, but the reduction of leeches is not necessarily the cause of environmental pollution, especially now in October, leeches are not out of the activity, so naturally they cannot be seen.

Hello dear, glad to answer for you. The way to see if there are leeches in the river is as follows: check whether the flow rate of the river is slow, usually leeches live in the slow flow of the river, and the hidden leeches are attached to the aquatic plants next to the river.

Leeches are generally found in damp places, such as aquatic plants, paddy fields, ditches, streams, swamps and other places. Leeches usually hide under rocks and grass during the day, and when they encounter food, they will quickly come out to eat, and at night they will come out to swim and move when the light is low. Thank you for your patience, the above is all my reply to this question I hope this service can help you, if you are satisfied with my service, please give a thumbs up, and I wish you all the best!

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Summary. Hello, dear. To tell if there are leeches in a river, here are a few things to consider:

1.Observe the surface of the water: Look closely at the surface of the river to see if you can spot leeches moving or floating on the surface.

Leeches are usually active near the surface of the water, so a patient look for a while may spot them. 2.Find a growing environment:

The environment in which leeches grow is usually a damp, shady, and flowing place. Check the banks of rivers or under rocks, where leeches may be hidden, to see if you can find them. 3.

Use testing equipment: If you have equipment such as leech bait or trap, you can put it in the water to attract leeches and see if any leeches are attracted and captured. Note that leeches typically move in warm and humid environments, and their behavior is influenced by weather, seasons, and other natural factors.

Therefore, even if leeches are not immediately found in the river, their presence cannot be completely ruled out. The best way to do this is to use a combination of observation and detection methods to determine if there are leeches in the river.

Hello, dear. To tell if there are leeches in the river, you can consider the following methods:1

Observe the surface of the water: Carefully observe the surface of the river to see if Dabu can detect leeches moving or floating on the water. Leeches are usually active near the surface of the water, so a patient look for a while may spot them.

2.Look for an environment where they grow: The environment where leeches grow is usually moist, shady, and where there is a flow of water.

Check the banks of rivers or under rocks, where leeches may be hidden, to see if you can find them. 3.Use of test equipment:

If you have equipment, such as leech bait or trap, you can put it in the water to attract leeches and see if any leeches are attracted and captured. Note that leeches are typically active in warm and humid environments that respect the mountains, and their behavior is influenced by weather, seasons, and other natural factors. Therefore, even if leeches are not immediately found in the river, their presence cannot be completely ruled out.

The best way to do this is to use a combination of observation and detection methods to determine if there are leeches in the river.

There are no grasshoppers or locusts in the ditch.

Kiss, you can check whether the flow rate of the river is slow, usually leeches live in rivers with slow flow speed and fingers, and leeches are attached to the aquatic plants next to the river.

I saw a lot of rivers and didn't have them.

Dear, the ecological environment is rarely seen now.

Leeches are a common aquatic parasite, which is divided into three types: dry leeches, water leeches and parasitic leeches. The first two are common to us, the leech usually builds its nest in the weeds of the stream and in damp and hidden places, while the leech likes to lurk in the water and grass, waiting for people or animals to enter the water before attaching itself to the body and sucking blood. Leeches are widely distributed in rivers but prefer to live in rivers with more humus.

Therefore, we should pay attention to the prevention of leech infestation during our activities, especially at the water's edge and in humid areas.

1. Whether there are leeches in the river, first of all, you need to analyze the turbidity of the river water and whether there is obvious sewage.

2. Check the river for thin layers of white algae moss, as leeches prefer to live in mossy environments.

3. See if there are small fish beating and shrimp wriggling in the river, and leeches are also female leeches who like to eat shrimp.

4. Observe whether there is a whirlpool phenomenon when the river water splashes down, which is caused by the leech reacting with the water with its own body fluids.

5. Observe whether leeches are active and predatory, and pay attention to the obvious movement of leeches floating and swimming while hunting.

6. Take out the sediment to collect a certain number of leech eggs, if there is no river water, the leech eggs inside will not exist.

Hello dear, according to your question, I have helped you find out: there are leeches in the Burjin River. Leeches are alien arthropods that swim on land and belong to the phylum Hyaline Mollusc.

They are able to be detected in different parts of the branches in the Burzin River. Leeches are an important residential component of the river as they can help clean up and purify the river's water, thereby improving water quality. Leeches have many useful properties, such as absorbing organic matter from the water, removing pollutants from the water quality, reducing the concentration of pollutants in the water, and helping to keep biodiversity under control.

In addition, leeches can also help maintain fisheries, thereby increasing fishery income and bringing better living conditions to local communities.

Because salt has a dehydrating effect. The body surface of the leech is not covered with **, the tissue moisture content is very large, and the salt sprinkled on the body will cause a higher concentration of solution outside the skin, and direct penetration into the body will accelerate the rate of mucus secretion until it shriveled and dies.

The most effective and pollution-free method to kill leeches in a large area is to sprinkle dry lime powder, when the leeches are contaminated with lime powder, they will festered and die, and they will die of physiological acid-base disorder in the alkaline water body with lime; The strong alkalinity of lime can only be maintained for a short period of time, and it can be diffused and desalined after insecticide, and it is also conducive to the improvement of the strong acidic old swamp soil after desalination.

Characteristics of leeches.

The body length is slightly flattened, at first glance it looks cylindrical, the body is about 2 15 cm long and 2 mm wide. The dorsal surface is green with black in the middle, with 5 yellow longitudinal lines, the ventral surface is flat, grayish-green, without variegated spots, the overall annular pattern is prominent, and the body segment is composed of 5 rings, each with a similar width.

10 eyes; When sucking the animal body, use this jaw to drill towards **, the body is large, the body length is 60-120mm, and the width is 13-14mm.