Plastic ingestion by seabirds including albatrosses, petrels, and shearwaters causes internal injuries, starvation, and toxicological harm across global populations.
Plastic ingestion causes chronic welfare harm — chicks with stomachs full of plastic starve despite parental feeding efforts. Adult birds carrying heavy plastic loads experience reduced foraging efficiency. The suffering is prolonged and invisible, occurring within closed bodies where observers see only declining condition before death. Ocean plastic reduction is directly connected to seabird individual welfare.