What kind of birds are "migratory birds"? Why is it moving?

Migratory birds are birds that migrate regularly with seasonal changes. Not a species, but birds with the habit of "regular migration".

On the one hand, it "moves around" because of the natural environment, because the change of seasons means that the temperature has changed, the climate has changed, and the means of survival (that is, food, water, etc. There is always not so much food in nature in winter, and the water may freeze or be too cold to swallow. Humans can adapt to the changes of the external environment temperature and climate through the increase or decrease of clothes, and can also change the surrounding temperature environment with the help of air conditioners, fans, small suns, stoves and other tools, not to mention food, while animals have nothing. Therefore, some animals can only find a more suitable environment in the changes of external environment, temperature, climate and a series of changes brought about by climate change, which is their long-term habit and their own way of life. Migratory birds migrate to find a habitat with more suitable temperature and more food, as well as natural activities that the body does under certain conditions.

Migratory birds are birds that migrate periodically with different seasons. Many birds have the characteristics of seasonal migration along latitude. In summer, these birds breed in temperate regions with higher latitudes, and in winter, they spend the winter in tropical regions with lower latitudes. In late summer and early autumn, these birds move from the breeding ground to the wintering ground, and in spring, they return to the breeding ground and fly north. These birds that migrate north and south with the seasons are called migratory birds.

There are winter migratory birds and summer migratory birds. Winter migratory birds migrate from high latitude to low latitude when the temperature drops and the weather is no longer warm, and summer migratory birds migrate from low latitude to high latitude when the temperature rises and the hot summer is about to enter.

On the other hand, some studies show that when some external environmental factors change, it will trigger some stress reaction changes in birds, thus inducing birds to leave their original places and migrate. For example, if some birds receive more sunlight than a certain standard, it will trigger their physical reactions and start to migrate. There are also some migratory birds who are very alert and uneasy during the breeding season, so they are migrating all day, moving in the direction of migration, or constantly taking off and flying.

Whenever the weather gets cold, some migratory birds begin to migrate. According to climate change, migratory birds mainly migrate from colder regions to warmer regions for winter. Common migratory birds are swallows, orioles, geese, swans and other birds. Every year, people can find groups of migratory birds flying regularly in the sky.

For example, when the weather turns cold, birds migrating from the north to the south, like swallows, are easily frozen to death because they have no strong cold-proof structure. Moving to the warm south, you can protect yourself well.