It was dusk and mildly chilly in Rome when I stepped out of Roma Termini, the city’s busy central train station, and heard relentless screeching noises from above. I looked up to see thousands of birds covering the treetops like bees on a honeycomb. A cloud of them sprang from one tree only to quickly dissolve into another. Bigger clouds of black specks curled and twisted even higher, over rooftops and looming cranes.
Starlings. Thousands of them, and just a small portion of the 1 to 5 million that overwinter in Italy’s capital.
To nature lovers, starling swarms – called “murmurations” – are fascinating and beautiful. Stunning videos of murmurations have captured the admiration of the Internet. They’re also a favorite example of swarming science, each individual bird following cues on speed and direction from its neighbors to form a massive, swirling shape in the sky.