This video is called Nesting Least Terns.
Translated from IMARES research institute in the Netherlands, on 30 May 2014:
Near Bonaire, an artificial island has been constructed where terns can breed without predators or disturbances. With the help of wooden terns decoys, after two weeks over ninety least tern couples are breeding on the island.
There are two common tern nests as well.
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