Dalmatian pelicans, the world's largest freshwater bird, nest in small colonies in Balkan wetlands where disturbance, habitat degradation, and pollution cause significant welfare harms.
Pelicans are among the most disturbance-sensitive colonial nesters — boats, people, or low-flying aircraft at distances up to 300 metres can trigger colony-wide flushing. Exposed chicks and eggs die rapidly from heat stress or predator attacks during disturbance events. Pelicans entangled in fishing nets drown or suffer wing and leg injuries requiring rehabilitation. Organochlorine and heavy metal contamination in fish prey biomagnifies in pelicans, causing eggshell thinning and reproductive failure.