You're very welcome. You might also enjoy this amusing postscript:
Thousands of birds weighed down the lines each time they landed en masse, he explained. The murmuration would set off in unison, causing the lines to clash together and trigger an outage.
Truly amazing:
https://www.theguardian.com/artanddesign/gallery/2020/dec/05/the-beauty-of-starling-murmurations-in-pictures
On the Guardian front page, this is entitled: 'Sky dancers: The beauty of starling murmurations', which might interest @skydancer.