In addition, the eyebrows decrease the amount of light reflected into the eyes. Among mammals other than human beings, a number of species have special hairs that respond to touch. Many nerves lie around these tactile hairs, which are commonly called whiskers. Whiskers grow on the lips and cheeks of most mammals, but they also occur on other parts of the body. These hairs help the animals feel their way through narrow or dark places.
Hair also provides various kinds of protection for animals.
The hair color of many species of mammals blends with their surroundings and helps them hide from their enemies and prey. The quills of porcupines, which also furnish protection against enemies, are a special type of hair. Hair acts as padding against blows and falling objects as well. Manufacturers use animal hair in making a variety of products. The thick, soft fur that covers some mammals is used for coats and other warm clothing.