Get Com/story/2073577-why-do-birds-suddenly-appear

Most of the birds : Wake up during the dawn and start singing or calling, as it is their mode of communication to their fellow beings, that the Sun has risen and a New day has begun. So they start flying out in droves and set out for the feeding or mating processes.

A flying bird changes direction by altering the angle or shape of its wings. By tilting one wing down it can turn towards that side. See how this works by making a paper plane and tilting one wing down. To slow down or land, a bird fans out its tail and tilts its wings back to create more air resistance.

Birds have a natural instinct to flee when they sense danger, and the presence of a human may be perceived as a threat.

There are generally birds everywhere, and their sudden appearance might simply be because you, a large moving animal, frightened them from wherever they were perching or foraging and became suddenly visible to you because they moved. If they hadn't moved, you might not have noticed them.

Nocturnal birds, like owls and nighthawks, wake up as the sun sets and hunt at night. During the daytime, they find a safe place and close their eyes to block out the light. By contrast, most birds are diurnal, meaning they're awake during the day and asleep at night.