The flight height of birds varies depending on factors such as species, breeding season, food sources and migration. Generally speaking, birds can fly at altitudes ranging from a few meters to tens of thousands of meters.
Some small birds, such as sparrows and house warblers, usually fly continuously from near the ground to over the woods, with flight heights usually between 10-30 meters. Large birds such as vultures and goshawks usually fly at higher altitudes, ranging from hundreds to thousands of meters.
Some large birds such as geese and swans migrate long distances every year. During their migration, they usually fly to altitudes of several thousand or even tens of thousands of meters in order to overcome high mountains and air resistance.
It is worth noting that not all birds can fly high. For example, most flightless birds such as ostriches and penguins can only walk or swim on land and cannot fly in the air.
