While the entire wadden coast is lined with sandy islands, a 60-meter high red rock arises out of the North Sea around 70 kilometers from the mouth of the Elbe and 45 kilometers west of Eiderstedt. Helgoland. Dunes have formed on remains of other rocks close by the red rock. Because Helgoland is the only rock island in the southern North Sea, it offers ideal nesting opportunities for many seabirds. Thousands of guillemots breed here every year. Kittiwakes, thick-billed murres, auks and since recently gannets also raise their young on the ridges of the red rocks. On the adjacent island of Dune, a stronghold of grey seals gives birth to their offspring each winter.

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