Seabird colonies provide critical opportunities for population-level welfare monitoring, with declining body condition and breeding success often indicating food web and climate pressures.
Seabird colonies are among the most accessible and informative windows into marine ecosystem health. Monitoring breeding success, chick condition, and adult body weight at colonies provides early warning of food availability problems that precede broader ecosystem collapse. From a welfare perspective, the key concerns are acute - disturbance causing chick and egg loss, mass mortality from avian influenza - and chronic - progressive reduction in adult body condition from declining fish prey. Avian influenza in particular has caused extraordinary suffering and population-level mortality in recent years, with no effective intervention available beyond biosecurity measures. Reducing the non-natural pressures on seabird colonies - disturbance, pollution, bycatch mortality - gives colonies the best chance of withstanding the natural and climate-related challenges they face.