Atlantic puffins face long-term population pressures from climate-driven changes to their prey fish. Understanding individual welfare within colony dynamics helps target conservation.
Puffin chick welfare during poor prey years is directly compromised by parental food shortfall. Chicks that do not receive adequate fish provisioning experience starvation over days before death. Adult puffins in years of widespread prey shortage show physiological stress indicators and body condition decline. The welfare impact cascades from climate change through oceanographic shifts to prey distribution changes to parental provisioning failure - a chain of causation that makes protecting the climate the ultimate puffin welfare intervention.