Colour Change According to the Environment

Do living creatures only make use of colour to protect themselves against their enemies? Definitely not. Some animals protect themselves also from cold and heat by means of enzymes giving colour to the hairs covering their bodies. In animals that live in cold regions, the hairs covering the tip of the legs, ear and nose, which are the most sensitive parts of the body, are dark coloured. Dark coloured hairs provide more heat energy for animals thus helping them to warm easier, just like humans who try to benefit from the sun better by wearing dark coloured clothes in winter. Colour change is very common in land animals. For example, in summer, the fur of the northern fox turns white, because their body temperature is high. In winters, however, as it becomes colder, their body temperature drops and a more suitable environment for the enzymes to work easily is provided. For this reason, in winters, the fur of the northern fox darkens. Rabbits, foxes, weasels, and polecats living in northern latitudes turn brown in summer and white in winter.While some birds become completely white in winter months, they take on a new appearance in spring matching the colour of the ground and vegetation.