Seabird colonies are highly sensitive to human disturbance during the breeding season, with even brief intrusions capable of causing mass nest abandonment and chick mortality.
Seabird colonies amplify disturbance impacts through social facilitation. When one bird panics and flies, neighbors do the same, and panic spreads through the colony in seconds. A brief disturbance can cause eggs and small chicks to be abandoned long enough for them to chill and die or be predated. Drone photography has been repeatedly associated with colony disturbance even when operators believe they are at a safe distance and altitude. Helicopter flights over colonies cause mass flushing. Predator control on seabird islands has dramatically improved breeding success for puffins, storm petrels, and other species. Human access restrictions during breeding season significantly reduce disturbance impacts. Cliff-nesting species like gannets and guillemots are vulnerable to disturbance at landing and departure areas.