Tüyler, or feathers, are specialized structures found on birds that serve various functions, including insulation, waterproofing, and aiding in flight. They are made of a protein called keratin, which is also found in human hair and nails. Tüyler come in different types, such as contour feathers for body shape, down feathers for warmth, and flight feathers for soaring through the air. In addition to their role in birds, tüyler have cultural significance in many societies. They are often used in traditional clothing, decorations, and art. The beauty and variety of tüyler have also inspired scientific studies, contributing to our understanding of evolution and adaptation in the animal kingdom.