Here is a short video that I took of the murmuration at Fen Drayton last weekend (it's worth bumping the picture quality to 720p, and I offer my apologies for the sound of my giggling over it):
Fantastic capture TH, fabulous sky & love how you've zoomed in on the individual groups as they join in the main body!
2013 photos & vids here
eff37 on Flickr
Very nice.