Stormo d'uccelli.

It is commonly thought that what leads birds to create movements organized in flocks is the presence of a "leader", but this is not the case. Each element of the flock refers to the bird closest to it, aligning itself with the direction it has taken. This is what determines the "group" movement.
In the group the birds find greater safety and greater ease of searching for food and unknowingly give us the opportunity to observe wonderful shapes and compositions in the sky.