Redheads make up one to two percent of the human population. They are frequently described as having blazing tempers to match their flaming red hair. Red hair is thought to have been worn by two persons in the Bible. The first was Esau, and the second was King David. There are other examples too, such as Moses, Elijah, and Elisha. Moses was a redhead. So was Jesus. King David also had red hair. And so did many of his soldiers. It was very common for people of that time not only to dye their black hair red but also their white hair blue, brown, or black. To this day, some Native Americans still use colors to dress their hair. There are several words in the English language that refer to different types of hair. Some of these words are hair, mane, pelt, plumage, and tail. A hair is a small filament from which fibers or threads can be drawn out. The word comes from the Latin hirsutus, meaning curly. Hair can be classified according to its structure: animal, bacterial, fungal, insect, plant, or synthetic. Animal hairs are found in animals' coats; bacterial hairs are found in certain plants' roots; fungal hairs are found on roses; insect hairs are found on butterflies and bees; plant hairs are found in cotton and hemp; and synthetic hairs are made of polymers.