Why are there no mosquitoes when it rains?

Specifically, because the seasonal fluctuation of mosquitoes is closely related to temperature, humidity and rainfall.

The normal physiological state of mosquitoes is inhibited, and they enter a dormant or diapause state. Female mosquitoes don't suck blood when they overwinter, their ovaries stop developing, and their fat bodies increase. They hide in caves, cellars, cracks in walls, greenhouses, basements and other dark, warm, humid and unventilated places, and their metabolism drops to the lowest point. In the next spring, mosquitoes began to recover and flew out to feed and lay eggs.

The climate between north and south of China is very different, and the seasonal fluctuations of various mosquito species are also different.

Extended data

There are more than 3,000 species of mosquitoes on the earth, but only 80 species bite humans. Mosquitoes are male and female, and their food is nectar and plant juice. However, female mosquitoes need to bite animals and suck blood to promote the maturation of inner eggs.

The average life span of mosquitoes is not long, which is 3~ 100 days for females and 10~20 days for males. Each female mosquito lays eggs about 1000 ~ 3000 in her lifetime. Generally, they lay eggs on the water, and it takes only five days from egg to adult.

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