The Blue Mountains are illuminated for 3 days for migratory birds. Why do migratory birds go south during this season?

We all know that migratory birds are migratory birds that migrate in groups. They migrate periodically as the seasons change, especially in autumn every year.

Migratory birds are a general term for those birds that have migratory behavior. Generally, the migratory birds we know include geese, egrets, swans, barn swallows, wild ducks, etc. These migratory birds mainly migrate from north to south.

The main factors that affect the migration of migratory birds include climate, temperature, lighting time, etc. In terms of climate, there is a big difference between the north and the south in autumn and winter, but some migratory birds like a relatively stable climate. The climate in the north in spring and summer is suitable for migratory birds to survive and breed, but the climate in autumn and winter is not liked by migratory birds, so they will fly in groups. south. At the beginning of autumn, there will be geese overhead, sometimes arranged in a herringbone formation, sometimes in a straight line, flying south in an orderly manner to spend the winter.

In terms of temperature, as the climate changes, the temperature also changes. This has a great impact on birds. On the one hand, food sources are reduced. Insects and some fruits are difficult to find in cold weather. The survival of birds lacking food will be seriously affected. Changes in temperature will also affect birds. Generally speaking, birds are warm-blooded animals. When the outside temperature decreases, heat dissipation will also accelerate. Then the birds will need more heat to maintain the same temperature, which will require more food. When the food is reduced in winter, they will They had to migrate to the south where food was plentiful and warm.

There are also some birds that are affected by the length of light. In the north in winter, the days are short and the nights are long. This affects the breeding mechanism of birds in some ways, which makes some birds become more mature just after autumn. Fly south for the winter.

This time, Blue Mountain turned off the spotlights in the square for three consecutive days for migratory birds. This is a manifestation of the harmonious coexistence between humans and animals. It is not difficult to see the warmth from it. Why turn off the spotlights? When migratory birds fly at low altitude, external light sources will affect their flight vision. In order to allow the migratory birds to successfully complete their migration, Blue Mountain turned off the spotlights in the square for three consecutive days. I think if migratory birds could talk, they would definitely say thank you when they fly over our heads.