Murmurations: Spectacular Starlings Signal Winter Is On Its Way

Owen Humphreys—PA/Landov
Owen Humphreys—PA/Landov
The following images in this gallery are of a murmuration of starlings arriving at Gretna in the Scottish Borders on November 1, 2011.

No one knows why they do it. Yet each fall, thousands of starlings dance in the twilight above Gretna, Scotland. The birds gather in magical shape-shifting flocks called murmurations, having migrated in the millions from Russia and Scandinavia to escape winter’s bite. Scientists aren’t sure how they do it, either. Even complex algorithmic models haven’t yet explained the starlings’ acrobatics, which rely on the tiny bird’s quicksilver reaction time of under 100 milliseconds to avoid aerial collisions—and predators—in the giant flock. Despite their show of force in the dusky sky, starlings have declined significantly in the UK in recent years, perhaps because of a drop in nesting sites. The birds still roost in several of Britain’s rural pastures, however, settling down to sleep (and chatter) after the evening’s ballet.

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