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← Nature & AnimalsWhich risk increases for birds experiencing rapid ascent into colder, drier air?
A)Increased hypothermia due to evaporative cooling✓
B)Increased turbulence alters wing airflow
C)Reduced oxygen levels harming metabolism
D)Air sac collapse reducing lung volume
💡 Explanation
Increased hypothermia occurs because evaporative cooling through pulmocutaneous water loss is accelerated by dry air. Rapid ascent and drying increase evapotranspiration, and therefore increase heat loss, rather than alveolar collapse which primarily impacts respiration at high altitudes.
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