Ruffled feathers at the windswept tarn

Tindale Tarn, Cumbria A flock of sand martins skim the choppy water and tufted duck bob on the dark grey water

Buffeted sideways by the gale, we descend to Tindale Tarn, a small lake in the RSPB reserve of Geltsdale. Skylarks spring up from rough pasture around the stony track to sing shrill and sweet as piccolos in a stormy sky. This land, once mined for coal and lead, is an important breeding area for upland birds; curlew, redshank and lapwing call as we huddle in the open-sided hide by the tarn.

A flock of sand martins skim the choppy water, having come here to feed from their nests in a nearby sand quarry. A cormorant is fishing, and tufted duck bob on the dark grey water. Wind catches the surface and runs with it, making flurries of waves. The back of a mute swan, neck submerged, resembles a plump meringue. The female sits on a nest close to the hide, dragging reedy stems around her body with her orange beak, primping and perfecting the huge mound.