Painted storks are colonial waterbirds of South Asian wetlands whose welfare is threatened by wetland drainage, pesticide bioaccumulation, and nest disturbance.
Painted storks exposed to agricultural pesticides through contaminated fish prey accumulate organochlorines causing eggshell thinning and reproductive failure. Nest abandonment triggered by human disturbance leaves eggs and chicks exposed to temperature extremes and predators. Wetland drainage removes foraging habitat, forcing birds to travel further and expend more energy. Juvenile storks entangled in fishing line suffer wing and leg injuries. Colonial breeding means welfare failures at established colonies affect entire regional populations.