Imagine you’re sitting in a small, low hide, with your knees up to your neck. You’re on a flooded bog that’s sinking deeper into the water every hour and sunset kicks in. You’re alone in an open river valley, far away from civilisation. All alone, except for some elks and roe deer splashing around in the marshes and a background choir of stunning bird species: river warblers, corncrakes, whinchats, rosefinches, woodcocks and wood-warblers …