One of my favourite words - "murmuration" - so evocative yet it means murmuring ( like another of my favourites - susurration - from whispering).
An even more startling bird-shape was reported a couple of weeks ago:
http://www.independent.co.uk/news/u...hape-of-giant-bird-daniel-biber-a8138216.html
https://static.independent.co.uk/s3...mbnails/image/2018/01/02/17/murmuration-1.jpg
They're learning to transform into a giant bird! This cannot be good news for humanity!