Harsh Ambient, Ambient rumblin_cynth_rampo
Murmuration

Starlings form together in large (often huge) groups called murmurations prior to settling down to roost.

Image of a starling murmuration at RSPB Saltholme courtesy of RSPB website (rspb.org.uk/birds-and-wildlife...ng-murmurations).

The bridge in the background is the Middlesbrough transporter bridge (engineering-timelines.com/scri...ngItem.asp?id=6)