The weather is getting colder and colder, and many migratory birds begin to fly to the south for the winter. So where is the south?

There is no fixed place in the south. For many migratory birds, the south is a place rich in food. The cold weather makes migratory birds move south. Many friends think that the drop in temperature will freeze migratory birds to death and force them to move south. Actually, it's not. Many biologists have confirmed that migratory birds are not weak in cold resistance. They are not afraid of cold because they have thick feathers. Migratory birds move south because of lack of food, with the aim of finding food conveniently.

Migratory birds, like resident birds, belong to warm-blooded animals They are very adaptable to the cold. Migratory birds, like resident birds, belong to warm-blooded animals They have thick feathers and are very adapted to the cold. It moved south not because it was afraid of cold, but because it lacked food. It moved south only to find abundant food. When the weather is cold, many insects begin to hibernate, or even reduce their activities, which makes migratory birds unable to prey normally. Only by choosing areas with richer food can it survive.

Just like this, it is confirmed that all migratory birds have high requirements for food, and their food is often fresh insects. Resident birds have low requirements for food. Simply put, they eat everything, such as magpies, which are typical resident birds. It also eats insects when the weather temperature is right, and even eats grass seeds when it is cold.

Migratory birds migrate southward at different distances. The so-called southward migration is not a fixed place. Migratory birds migrate southward at different distances. Some migratory birds migrate relatively close, while others migrate relatively far. For many migratory birds, its southward migration is only from mountain to mountain, and only a few migratory birds will migrate long distances. But even if it is a long-distance migration, it will not always fly south, as most people think, but gradually fly to a warm place. In this process, it may fly north first and then south. It is not difficult to see that the so-called south where migratory birds move south is not a fixed place, but a place with relatively rich food.

Migratory birds move south to places where food is relatively abundant in continuous flights and temporarily survive in places where food is relatively abundant. When the temperature in the north begins to rise, migratory birds will fly back from places with relatively rich food in order to breed the next generation.

Birds migrate south to winter and then return in spring, which is the strangest behavior, and the reason is only to breed the next generation of migratory birds. Although migratory birds will not reach their destination once, they will stop many times or even many times, but the farthest flight distance of migratory birds can reach tens of thousands of kilometers. This makes many people question why migratory birds don't find a place where the seasons are not obvious. The reason is just to reproduce the next generation.

If you know something about birds, you will know that most migratory birds themselves originated in the tropics. The reason why it flies tens of thousands of kilometers to breed in other places is because its origin is not suitable for the breeding of migratory birds. In other words, the breeding competitiveness of the country of origin is very strong, and only in the north can good breeding conditions be obtained.

The weather is getting colder and colder, and many migratory birds begin to fly to the south for the winter. Everyone knows where the south is! For migratory birds, the south is a place where food can be fully supplied. Its long-distance migration has a great relationship with the reproduction of future generations, and the whole migration and reproduction has become a miracle of nature.