Wild Curlew Winter Estuarine Welfare: Critical Foraging on Tidal Flats

British estuaries support internationally important flocks of wintering curlews, whose welfare during this season depends on tidal flat food availability, disturbance levels, and severe weather events.

Key Facts

UK estuaries support some of the largest concentrations of wintering Eurasian curlews in Europe
Curlews feed on estuarine invertebrates including ragworms, lugworms, shore crabs, and bivalves
The long, downcurved bill is adapted for probing soft sediment to extract burrowing invertebrates
Severe cold weather forces curlews onto less preferred inland foraging sites when estuarine ground freezes
Disturbance from recreational activities, wildfowling, and dog walking reduces foraging time and increases energy expenditure
Roosting flocks gather on saltmarsh and rough grassland above the tideline; roost site availability is critical
Winter survival depends on building adequate fat reserves to support early spring migration to upland breeding grounds
Estuarine habitat loss and deterioration through coastal squeeze and development threatens long-term carrying capacity

Welfare Considerations

Wintering curlews face a welfare challenge that is fundamentally energetic: they must consume sufficient food on tidal flats during the brief windows when tides expose invertebrate-rich sediment. Disturbance that forces birds to leave feeding areas reduces the time available for this critical food acquisition. In cold weather, when metabolic demands are highest, disturbance impacts are most severe. Protected time for curlew foraging on key estuaries - including disturbance-free zones during peak feeding tides - is a direct welfare intervention with measurable benefit for individual birds and the populations they support.

What You Can Do

Keep dogs on leads near estuarine curlew flocks and avoid approaching roosting birds
Support the creation and enforcement of disturbance-free zones on important curlew estuaries
Donate to the RSPB and Wildfowl and Wetlands Trust for estuarine habitat management
Contribute curlew winter count data to WeBS (Wetland Bird Survey) monitoring
Advocate for coastal planning policies that protect estuarine habitat from development and coastal squeeze