When the wind is strong, flies can't fly. Why?

Flies belong to Diptera insects. Diptera insects will be affected by airflow when flying, because the road surface is not completely flat, and the flight of flies is not an air show, just for survival, and there is no need to fly in a straight line. As for the speed, it is about 4 meters per second, per hour 140 kilometers. It doesn't matter if the wind speed can't reach its flying speed. If the wind speed is greater than its flying speed, it will have a greater impact on it.

They hid long before the bad weather, so don't be afraid. Humans can also rely on animal reactions to predict weather changes. It rains when ants move, which is the most typical example. Factors affecting the life span of flies include temperature, humidity, food and water. The optimum temperature is 25-33℃ and the air humidity is 60-70%. The adult life of common flies is 15-25 days. If larval stage and pupal stage are included, the life span is 25-70 days.

Natural phenomena caused by airflow. It is caused by solar radiation heat. Sunlight shines on the surface, which makes the surface temperature rise, and the thermal expansion of the surface air becomes lighter and higher. After the hot air rises, the low-temperature cold air flows laterally, and the rising air drops due to the gradual cooling and weighing. Because the surface temperature is high, it will heat the air and make it rise, and the airflow will produce wind. Wind usually refers to the horizontal motion component of air, including direction and magnitude, that is, wind direction and wind speed.

Strong winds can move objects and their directions. The wind is fast. The horizontal wind speed in the atmosphere is generally 1.0~ 10m/s, and typhoons and tornadoes are sometimes102m/s. The wind speed in farmland can be less than 0.1m/s. There are two kinds of wind speed observation data: instantaneous value and average value, and the average value is generally adopted. Wind speed measurement is mainly carried out by connecting wind direction anemometer, portable anemometer, dyne anemometer and hot ball anemometer to measure farmland wind power; It can also be estimated according to the signs and wind levels of ground objects.