The period when the seasons change is critical to the evolution and continuation of life on the planet. These periods are occasion for changes in animal behavior and affect the life cycles of plants as well.
Why the Seasons Occur
This change happens because of the Earth’s evolution around the Sun. As the Earth spins, its axis tilts on one side. The axis is the imaginary line running north / south of the planet. It is the line that veers when the Earth rotates. The result is that one half is closer to the Sun and the other is further away.
These halves are divided by the equator. This is a line that runs around the Earth. The one at the top is the Northern Hemisphere and at the bottom is the Southern Hemisphere. When the seasons change, it is due to a hemisphere’s proximity or distance to the Sun.
Duration and Period
If the Northern Hemisphere is near the Sun, it is summer. If it is on the other side, it turns to winter. When the hemispheres are the same distance from the Sun, spring and autumn / fall take place.
Summer usually begins in June in the Northern Hemisphere and lasts until August or September. Winter starts in December and goes on until March. Autumn starts in September while spring takes place after winter. The dates for their occurrences are of course opposite in the Southern Hemisphere.
What Happens When the Seasons Change
During winter season most animals go into hibernation or migration. Among bears and reptiles it is the time they “go to sleep” and will emerge after the season. Beavers and raccoons consume the food supplies that they collected. Most plants and flowers also perish at this time.
The spring season follows. The flowers and plants start to bloom, and the leaves start to reappear on trees. The excessive rainfall or snow begins to melt. The birds that have migrated return to their nests and nurture for their young.
Animal activity reaches its peak in the summertime. The activity is not limited to animals and plants. It most cultures and countries, it’s a time when people go to play sports or head to the movies. It is the time when temperatures are at its highest.
The final period when the seasons change is autumn. It is usually the harvest time. Trees also undergo change. They shed foliage and the animals start to collect food. When autumn ends, winter will start and the cycle will begin again.
Dry and Wet Season
In some parts of the world (especially Southeast Asia) there is only the dry and wet season. The dry season takes place from November to May. The rainy season goes on from June to September. In some regions there is also a “cool but dry” season lasting from October to February.
The times when the seasons change signal altering patterns of behavior among animals and people. By understanding how they work it becomes easier to recognize animal behavior.