Everything looks different on a country walk seen in late evening light. Budding horse chestnut trees with fast-opening sticky buds and crumpled new leaves are silhouetted against the clear moonlit sky. White blackthorn blossoms in the hedgerows and rows of cut maize stubble reflect the last rays of the sun. Blue-green shoots of spring wheat can still be made out in the fields as the sun disappears; and trees by the stream retain a faint glow when the sun finally goes down. In the quiet of the dusk, the burbling of the river mingles with birdsong and the dark surface water riffles and eddies over beds of water crowfoot as it makes its way downstream.