What changes do animals have in a year?

Spring: Due to the shortage of food supply throughout the cold winter, animals are generally thin and yellow. As the weather gets warmer, mammals begin to shed their thick villi. And gradually began to move to a safe area where food is gradually abundant.

Summer: Animals have beautiful bodies and smooth fur. Animals will choose this time to form a family and give birth to offspring.

Autumn: Early autumn is influenced by the climate, and the temperature difference between morning and evening is large, which is beneficial to plant fruits to lock in more sugar, so autumn fruits have the highest nutritional value, and animals will choose to store food or fat for the winter at this time.

Winter: Animals are relatively fat, and due to the influence of climate, they begin to become thick and warm fluff. Even the coat color of some animals will change greatly, such as the mountain rabbit in the Arctic. In summer and autumn, the coat color is brownish gray (hay color), and in winter, the coat color is all white, with considerable color difference.

Extended data:

The changing law of the four seasons:

From vernal equinox to summer solstice to autumnal equinox, the northern hemisphere is in summer and the southern hemisphere is in winter. During this period, the northern hemisphere has long days and short nights, while the southern hemisphere has short days and long nights. The north pole is in the extreme day and the south pole is in the extreme night;

The height of the sun north of the Tropic of Cancer is always greater than the average, while the height of the sun south of the Tropic of Cancer is less than the average. North of the Tropic of Cancer, the sun rises on the northeast horizon and sets on the northwest horizon. On the vernal equinox, the sun all over the world rises in the east and sets in the west.