A friend sent me this video. The huge flock of European Starlings is truly amazing, and they are in their native range! The shear numbers alone would make this video worth watching, but the movement of each individual within each group, and the coordination of the different groups on top of that, makes this simply breathtaking.
P.S. A group of Starlings is called a murmuration.
abirdingnaturalist 
I’ve seen ‘murmurations’ myself but nothing on that scale – awesome stuff.
Glad you liked it. It just took my breath away! I have watched it half-a-dozen times already!