Straw binding method: bind the straw into a 60 cm long bundle, tighten the front and back ends, then stick frog blood on it, and take out the grass to catch leeches the next day. ?
Grazing with a dustpan: wrap the killed frogs (or pig lungs and other animal viscera) with gauze, tie them in a dustpan, and then put them in the water where leeches often leave people, and hang them 20 cm below the water surface, so that leeches will enter the dustpan for food, and then lift the dustpan the next day, which is quite rewarding.
: 1. Leech, commonly known as leech, belongs to the leech class in annelids. There are 400-500 species in the world, about 100 in China, and 89 species have been found. Most leeches live in fresh water, some in land and amphibians, a few in salt water, and some in land and amphibians. There are species that feed on blood or body fluids, and there are also species that prey on small animals. People's common leeches in rice fields are called Japanese medical leeches, which feed on the blood of people, livestock and frogs. There are some grasshoppers living in the forests of Hainan Island and Taiwan Province Province. They often lurk in the grass and bushes. Leech can be used as a valuable Chinese herbal medicine after processing. In recent years, due to the threat of chemical fertilizers and pesticides to its living environment and predatory capture by human beings, the wild resources of leeches are decreasing day by day. In order to meet the market demand, the artificial breeding industry of leeches has developed rapidly.
2. Leech is a general term for tailless amphibians and leeches. These animals are different from other annelids such as earthworms or nereis, and most of them live a temporary parasitic life in vitro. In line with this lifestyle, leeches have no bristles, and there are suction cups at the front and rear ends, and their muscles are well developed, and their body cavities are divided and filled by muscles and connective tissues to shrink.
3. Locust is a highly specialized annelid. There are more than 300 kinds of * * in the world at present. Most of them live in fresh water; A few species are seawater or salty fresh water; There are also some terrestrial or amphibious; Mostly in warm and humid areas. Size between 4-200mm. Grasshoppers have a belt and are hermaphroditic. Therefore, it is generally believed that it evolved from an oligochaete ancestor who adapted to ectoparasitism.
4. Many kinds of grasshoppers feed on the blood of vertebrates or invertebrates. Some are more or less fixed on individual animals, close to ectoparasites; Some only attack the host temporarily and fall off after sucking enough blood; But some of them belong to common carnivorous or saprophytic animals.