change by the season
All body hair mainly plays a role as the protection against the cold, but growth of hair changes to support the difference of the climate by the season in the clear area of the four seasons. It of the summer is called hair (pour it) in the summer, and it of the winter is called a winter coat of fur. Generally the hair that a winter coat of fur is smaller grows thick. A winter coat of fur is pleased with in the use of the fur. These two hair has the example that the color of the appearance changes greatly, and, with a stoat and the Echigo rabbit, it is it to hair pure white in winter. This acts as protective coloration in snowy many districts. There is the time when such a hair is replaced in the time when I am short in this middle season and is called a hair change. In addition, even a bird is watched and after all calls such a change with hair, a winter coat of fur in the summer.