The main feature of deciduous trees is their ability to shed leaves annually in response to seasonal changes, particularly in temperate climates. During the autumn, these trees prepare for winter by breaking down chlorophyll and reabsorbing nutrients from the leaves, which then change color and eventually fall off. This process helps the trees conserve water and energy during the cold months when photosynthesis is less efficient. In spring, deciduous trees produce new leaves to take advantage of the increased sunlight and warmth, allowing them to thrive in their growing season. Common examples of deciduous trees include oak, maple, and birch.