Animal fur is a dense coat of hair that covers the bodies of many mammals. It serves several important functions, including insulation to keep animals warm, protection from the elements, and camouflage to help them blend into their surroundings. Different species have varying types of fur, which can be short, long, thick, or thin, depending on their habitat and lifestyle. Fur is made up of keratin, the same protein that forms human hair and nails. Many animals, such as dogs, cats, and bears, shed their fur seasonally to adapt to changing temperatures. Fur can also vary in color and texture, contributing to the unique appearance of each species.