Shorebirds gather in massive roosts during migration and winter, making them vulnerable to disturbance that disrupts feeding and triggers energy-costly panic flights.
Disturbance welfare for shorebirds requires thinking at both individual and population levels. An individual bird flushed from a roost expends calories that must be replaced through additional foraging - a direct energetic cost. In birds at the end of long migrations or facing poor foraging conditions, this margin may be slim. Repeated disturbance creates chronic stress responses and may cause abandonment of critical sites. During breeding season, disturbance of nesting birds leaves eggs and small chicks exposed to temperature extremes and predators - causing direct mortality. The cumulative disturbance from well-meaning but poorly managed recreational activities at sensitive sites causes genuine welfare harm.