Which risk increases when migratory birds encounter prolonged intense headwinds?

💡 Explanation

When birds experience intense headwinds, increased flight effort generates higher aerodynamic loads, causing greater frictional forces on the feathers,leading to accelerated wear and separation of barbs, significantly increasing drag. Therefore increased feather wear results, rather than atrophy, navigation issues or suppressed cortisol, which involve different physiological mechanisms.

• Which outcome occurs when xylem vessels in a tall tree experience significant damage from an ice storm?
• Which outcome results when a songbird's syrinx is constrained?
• Which outcome occurs when xylem walls weaken in tall trees?
• Which outcome occurs when tropical trees utilize CAM pathways?
• What outcome occurs when ground squirrels arouse from hibernation and circulating norepinephrine triggers futile cycling?
• Which airflow characteristic maximizes efficiency during thermal soaring above land?