Variable oystercatchers nest on New Zealand beaches and face significant welfare and conservation threats from human disturbance, dogs, and vehicle traffic.
Oystercatchers disturbed during incubation experience acute stress from predator-like intrusions by people and dogs. Repeated flushing prevents adequate egg incubation, leading to embryo mortality. Eggs exposed to sun during disturbance die rapidly from overheating. Chicks disturbed by dogs run into the sea and can drown or become separated from parents in cold water. The long incubation period and low productivity of successful pairs makes disturbance impacts on individual welfare particularly significant.