Which risk profile dramatically changes when avian air sacs fail to maintain unidirectional airflow during flight?

💡 Explanation

When air sacs fail, ventilation inefficiency triggers higher metabolic heat retention because unidirectional airflow mechanism is disrupted resulting in decreased evaporative cooling over air capillaries. Therefore overheating at altitude increases, rather than hypoxia decreased at sea level, diminished predation/parasitism under certain climactic circumstances if physiological function is preserved.

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