[youtube=http://youtube.com/watch?v=kmgLYxSaFpY]This clip of a flock of birds is amazing. I haven’t seen this much in the U.S., but when I lived in Rome it was a common sight in the summer when the starlings that spent their days feeding in the fields outside the city, returned to the center to roost in the warmth of the city trees at night.
Woe to anyone who had parked their car underneath!