The wood sandpiper (Tringa glareola) is a small wader that is distributed across northern and subarctic Europe. Bogs and tundra is used as breeding habitat. In central Europe, like here in marsh land, they pass by on their migration to wintering areas in to the southern hemisphere and back.
This image was taken from a floating hide in the Biebrza marshes of eastern lowland Poland.
Canon EOS 5DMk IV, EF 500 mm IS, 1.4 tc, ISO 800, Stativ, selfmade floating hide © Marco Hoffmann.