A boldly pied coastal wader with a long, bright orange bill used as a hammer and lever to open bivalves — conspicuous, loud, and one of the most recognisable shorebirds of rocky coastlines worldwide.
The bill
The oystercatcher’s bill is its defining tool — long, straight, bright orange-red, and blunt-tipped. It has two feeding techniques depending on what prey is available, and individual birds tend to specialise:
- Hammering — driving the bill repeatedly into a mussel or cockle to crack the shell, then levering the halves apart
- Stabbing — probing into sand or mud to find cockles or worms by touch; the bill is inserted, the adductor muscle is cut, and the prey is extracted
Individuals that learn one technique rarely switch. The technique learned in the first winter tends to persist for life.
Oysters
Despite the name, oystercatchers rarely eat oysters in most parts of their range (oysters are too thick-shelled). The name comes from an 18th-century observer in South Carolina who saw them eating oysters. In most of Europe, their main food is mussels, cockles, and ragworms.
Breeding
Pairs form long-term bonds and return to the same territory each year. Both sexes incubate a clutch of 2–3 speckled eggs in a scrape on rock or shingle. Chicks are precocial but are fed by parents for an unusually long time — up to a year — while learning the complex feeding technique.
Population
The Eurasian oystercatcher has expanded inland in Scotland and parts of England since the 1940s, nesting on river shingle and agricultural land rather than exclusively on the coast. This inland colonisation is well documented and ongoing.