Tree silhouettes are the dark outlines of trees against a lighter background, often seen during sunrise or sunset. These silhouettes highlight the unique shapes and structures of different tree species, such as oak, pine, or willow. The contrast between the dark trees and the colorful sky creates a striking visual effect. Photographers and artists often use tree silhouettes to capture the beauty of nature. They can evoke feelings of tranquility and solitude, making them popular subjects in landscape photography. Additionally, tree silhouettes are commonly featured in graphic design and illustration for their aesthetic appeal and simplicity.