That animal is very active in the summer solar terms.

Animals with active solar terms in summer include mosquitoes, flies and fireflies.

The three phenology of the summer solar terms are: rotten grass at the beginning of fireflies, humid soil and heavy rain. In the summer night, fireflies will fly around in the rotten grass for food, so "rotten grass is fireflies". The poet Heshui Zuo said in his poem "Summer": "The sun is hot, and it is hot in summer, and it is flies and mosquitoes. The cloud swells and the arrow scatters gold on the lotus pond. " This paper describes the hot summer weather, drought and lack of rain in China, where mosquitoes and flies bite people.

Summer is one of the twenty-four solar terms of the lunar calendar, and the sun is located in the yellow meridian 120. In the hot summer, China people have the custom of drinking tea, drying ginger, burning incense and drinking mutton soup. The summer solar term is just around the Mid-Autumn Festival in the dog days, which is the hottest period of the year, with the highest temperature and the fastest growth of crops. At the same time, various meteorological disasters such as drought, waterlogging and wind disasters are also the most frequent in many areas.