The sound of wind rustling through trees is a natural phenomenon caused by air movement. As the wind blows, it interacts with the leaves and branches, creating a gentle, soothing noise. This sound can vary in intensity depending on the wind's speed and the type of trees present. Different species of trees produce distinct rustling sounds. For example, the leaves of maple trees may create a soft whisper, while the needles of pine trees can produce a sharper, more crisp sound. The rustling can also change with the seasons, becoming more pronounced in the fall as leaves dry and become brittle.