Penguins in captivity face significant thermoregulation challenges, particularly in warmer climates. Pool access, shade, and climate control are essential for welfare in zoological settings.
Penguins evolved for cool, marine environments and lack effective behavioural heat dissipation mechanisms for prolonged warmth. Chronic heat stress causes immunosuppression, reduced reproductive success, and reduced activity levels. In poorly designed facilities without adequate cooling, penguins spend extended periods in postures indicating thermal discomfort. Modern zoo welfare standards require climate-controlled indoor areas, cool pool water, and access to shade at all times. During summer heatwaves, additional interventions — ice provision, increased misting — may be needed. Zoos in hot climates housing cold-adapted penguin species face a fundamental welfare challenge that should inform species selection decisions.