Disturbance of nesting birds causes nest failure, chick death, and stress that is largely preventable through public education and appropriate land management.
Disturbance-induced nest failure leaves eggs and chicks to die of cold or predation. Adult birds flushed repeatedly from nests experience significant physiological stress that affects their condition and survival. The welfare cost of disturbance is both immediate - eggs chilling in exposed nests - and cumulative - adults depleting energy reserves through repeated flight responses. Simple behavioural changes including keeping dogs on leads prevents most disturbance welfare costs.