This video is called Red-breasted Merganser courtship display.
Wardens of the Boschplaat nature reserve on Terschelling island in the Netherlands report seeing a red-breasted merganser with ducklings.
So, a case of nesting for this species, rare in the Netherlands.
Only about 35-45 couples nest in the Netherlands usually. Mostly not in the Wadden Sea region, though there was a case on Griend island.
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