Where is the origin of snails?

The field snail refers to the molluscs of the family Oncomelidae, which belongs to the subclass Gastropoda. The field snails are distributed in most areas of China. The snails have high requirements for water quality and low yield, and can be caught in summer and autumn. Chinese round field snails are often found in fresh water.

The snail is a gastropod mollusk, which likes to live in the water where the winter is warm and summer is cool, the bottom is soft, the bait is rich and the water quality is fresh, especially in the place of micro-running water. Field snails have miscellaneous feeding habits, mainly eat tender stems and leaves of aquatic plants, organic detritus, etc., and field snails like nocturnal activities and feeding, and the most suitable temperature for growth is 20-27 ℃. When the water temperature rises to 15 ℃ in late spring and early summer, the field snail climbs ten times from the overwintering hole and feeds on the bottom of the water. It began to breed in April, and the breeding season of field snail was exuberant from July to August. The female snails of 1 and 2 years old can give birth to 20 and 30 young, and the female snails of more than 4 years old can give birth to 40 and 50 young. The young snail grows rapidly after birth and can develop into sexual maturity in one year. April to September every year is the litter season.

Snails like to inhabit the water environment rich in humus in the sediment, such as lakes, ponds, marshes, field valleys or slow-flow river ditches with luxuriant water plants, often feed on microorganisms and humus in the soil and phytoplankton, young aquatic plants and moss in the water, as well as artificial fodder, such as fruits and vegetables, vegetable leaves, rice bran, wheat bran, bean flour (cake) and various animal scraps. The snail is resistant to cold and afraid of heat, and the suitable temperature for its life is 20-28 ℃. When the water temperature is lower than 10 ℃ or higher than 30 ℃, the snail stops feeding and goes into the soil and grass to avoid cold and summer. When the water temperature exceeds 40 ℃, the snail is scalded to death. In the dry season, it completely shrinks the soft part into the shell to reduce water evaporation; in the cold winter, it will drill into the soil and remain hibernating. In the warm spring period, when the temperature rises to suit its activity, it will crawl with its head and feet sticking out of its shell. It is most suitable to grow at 20-26 degrees Celsius, when it eats most vigorously and grows fastest. When the water temperature rises to 30 degrees, stop eating. It is not resistant to high temperature, but it is very hardy, and it will dig holes and breed through the winter in the cold season.