Wild Dunlin Welfare: Estuarine Wader Under Climate Pressure

The dunlin is Britain's most abundant wintering wader, with huge flocks feeding on estuarine invertebrates, but breeding populations in upland bogs are declining under climate pressure.

Key Facts

Dunlin breeding populations in Britain have declined by around 34% since the 1990s
The species breeds on upland blanket bogs and moorland where it feeds on invertebrates in shallow pools
Climate change is drying upland peat bogs, reducing the wet pools and soft ground on which breeding dunlin depend
Winter populations are supplemented by birds from Iceland, Greenland, and Siberia, concentrating on British estuaries
Estuary roosts can contain tens of thousands of dunlin in spectacular murmurations above tidal flats
Dunlin probe soft estuarine sediment for invertebrates including marine worms, small crustaceans, and molluscs
Coastal development and land claim have reduced estuarine habitat available to wintering flocks
Mudflat productivity determines prey availability; warmer winters may affect invertebrate communities

Welfare Considerations

Dunlin welfare spans two entirely different ecological contexts: upland bog breeding and estuarine wintering. Breeding welfare is threatened by bog drying - birds that cannot find moist ground for foraging or suitable wet pool habitat for chicks face reproductive failure. Wintering welfare is threatened by coastal squeeze, disturbance, and changes in estuarine productivity. Peatland restoration that rewets drying upland bogs is the most direct breeding welfare intervention; estuarine habitat protection and disturbance management support winter welfare.

What You Can Do

Support peatland restoration projects that rewet upland blanket bog for breeding waders
Contribute dunlin sightings and counts to WeBS and BTO monitoring schemes
Advocate for coastal planning that protects and extends estuarine habitat against coastal squeeze
Donate to RSPB and WWT estuarine reserve management for wintering wader welfare
Keep disturbance low around large wader roosts on key estuaries