Sand Martins / Bank Swallows (Riparia riparia).
Brodtener Ufer is a 4 km long and up to 20 m high Baltic Sea steep
coast between Lübeck-Travemünde and Niendorf (Ostsee). It is a living cliffed coast, which means that it is still being eroded by the Baltic Sea and the
weather conditions, and is receding 50 to 100 cm per year.
Large parts of Brodtener Ufer are protected by European law as it is home to one of Europe's largest sand martin colonies with about 2600 nesting tunnels.