Temperature is the most important factor determining the growth and development rate of insects. Climate warming can accelerate the development of various insect states, leading to earlier emergence, migration and population to peak period. Terrestrial insects look a cool and humid place when the environment is too hot . If exposed to the sun, it keeps itself in a position where the surface area of ??the body is the least heated. If it is too cold, insects stay in the sun to warm up. Many butterflies need to spread their wings to collect heat before flying. Moths shake their wings before flying by shake the body, and use hair or scales to form an air insulation layer around the body to maintain the body temperature. The most suitable muscle temperature for flight is 38～40℃ (100～104℉).
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