Wildlife

Oystercatcher Welfare: Shellfish Bed Decline in the UK

The Eurasian oystercatcher depends on intertidal shellfish beds for food and its welfare is threatened by the decline of cockle and mussel populations around UK coasts.

Key Facts

UK oystercatcher populations have declined by around 30% over the past 25 years
They specialise in feeding on mussels, cockles and worms on intertidal flats
Cockle beds in estuaries such as the Wash and Solway Firth are critical feeding sites
Commercial shellfishing can reduce food availability, directly impacting bird body condition

Welfare Considerations

Food shortage forces oystercatchers to spend more time foraging, reducing energy reserves and body condition, particularly in winter. Cold weather events can cause mass mortality when birds cannot meet energy requirements. Oystercatchers with poor body condition are less able to breed successfully and more vulnerable to disease and predation.

What You Can Do

Support sustainable shellfishing regulations that protect intertidal ecosystems
Advocate for monitoring of oystercatcher body condition at key estuarine sites
Donate to wetland and estuary conservation organisations
Avoid disturbing roosting birds on estuaries during cold winter weather