Joyful Murmuration
A murmuration is an enormous flock of birds (often starlings) which rise up en masse from the ground or trees around twilight. They swoop and sweep across the sky creating magnificent constantly changing abstract shapes and not one bird ever hets another or crashes to the ground. This is a really wondrous thing to see as all the birds are joyfully twittering together as they create shapes similar to huge schools of fish as they move and change direction simultaneously.