This video shows an oystercatcher in Norway.
From the Univerrsity of Amsterdam in the Netherlands:
Oystercatcher (Haematopus ostralegus) populations in the Netherlands have dramatically declined during the last decades. CHIRP (Cumulative Human Impact on biRd Population) aims to determine which pressures in breeding and wintering areas cause the observed negative population trend. In winter, the Wadden Sea harbours large numbers of oystercatchers. Despite the vast amounts of shellfish available on the mudflats, oystercatchers encounter multiple difficulties in their wintering areas. For example, food stocks become more limited by fishery and the increase of the Pacific oyster. Furthermore, the Wadden Sea area is used for many different recreational purposes, causing disturbance of waders from the land, water and air. Walkers, cyclists, boats and airplanes are a few examples of disturbance sources present in the Wadden Sea. Disturbance might have direct energy costs for oystercatchers if the birds…
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