It’s bone-chillingly cold as we wait, scanning the sky over Ripon City Wetlands from a strip of land next to the River Ure. Arctic winds have brought an unseasonable plunge in temperatures for late autumn, and there are large stretches of ice in the reserve’s lagoon.
At 3.45pm, the action starts. The sky – a layer of orangey-pink around the setting sun, the lightest of blues higher up – is dotted with groups of starlings converging on the line of trees. They’re just dribs and drabs to start with, little flocks of 20 or 30 birds. But within a few minutes, the flocks are hundreds-strong, pouring in from all directions, then joining forces in a twisting, shape-shifting, aerial dance.