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An Eurasian Reed Warbler (Acrocephalus scirpaceus) carrying a ring from Helgoland (Germany), was monitored during a scientific ringing day in Urdaibai. This could be an late migrator going to the breeding areas in Scandinavia, because the arrival of the species to the nesting areas in the North of Europe lasts until the first fortnight of June.

 The island of Helgoland is situated on the North Sea, 80 km away from the coast of Germany. It has a surface lower to 4 km². The island has seacliffs where important colonies of seabirds are settled, dune areas where some anatidae and waders breed, but also great beaches where a large population of Harbour and Grey Seal. Apart from this, Helgoland has kept for more than 100 years a ringing station that along its history has contributed to a better knowledge of the migratory movements of hundreds of species in Europe.

Location of Helgoland archipielago in the North Sea

Helgoland Archipielago (Germany)