swarm of seabirds at an icehole in the frozen baltic sea in germany

swarm seabirds icehole frozen baltic sea germany winter ice snow arctic birds hole sunset sun flight birding bird birdwatching seashore flying ornithology wildlife europe blue horizon water nature ocean background coast sky travel outdoor landscape beach white view light seaside surface bright texture holiday greifswalder bodden greifswald mecklenburgvorpommern ruegen meeting