Marine plastic pollution is causing significant individual suffering and population-level harm in seabirds globally, with albatrosses, petrels, and shearwaters among the most severely affected species.
Plastic ingestion causes individual seabird suffering through multiple mechanisms. Physical obstruction reduces stomach capacity, causing false satiety in parents who feed chicks inadequate nutrition. Perforation risk and toxin leaching from plastics cause additional physiological harm. The scale — affecting the majority of individuals in many seabird populations — makes plastic ingestion one of the largest ongoing sources of marine wildlife welfare harm. Individual welfare improvement requires systemic plastic reduction: less plastic entering ocean systems through production reduction, improved waste management, and policy restrictions on single-use plastic that enters marine environments.