Nocturnal Maridalen

Today's birding was restricted to a trip to Maridalen in the early hours. Just four species recorded in the (near) darkness, a chattering Fieldfare, a piping Green Sandpiper (skogsnipe), a reeling River Warbler (elevsanger) which has now been here a week and perhaps best of a crexing Corncrake (åkerrikse). It was a bit windy and chilly so perhaps not all species would have been vocal but I am surprised that there are no Marsh Warblers (myrsanger) yet to hear in Maridalen. The first Corncrake for the year in Oslo though was more than sufficient though.