Murmuration, Sunset Dance - starlings dancing in the sky

My friend Sadeep forwarded this, and I would like to store it here.

One of nature's great sights.

It looks like there are other videos of this on YouTube, but this one is captured by someone while canoeing...So they were there on the water while the birds danced above them..

Murmuration from Sophie Windsor Clive on Vimeo.
Didn't do much reading but, some articles say that this is done by birds while migrating at the start of winter. And then, I read some comments on videos saying that this is done by the starlings every evening at sunset in their towns..