Which wing adaption results when a migratory bird experiences turbulence?

💡 Explanation

Unstable airflow activates the alula feathers; this modifies airflow above the wings using vortex generation, therefore recovering from stall conditions, because the induced vortex re-energizes the boundary layer, rather than directly increasing lift alone, or providing thrust.

• Which risk increases when a soaring bird remains aloft during rapid cloud formation?
• Which aerodynamic effect primarily enables soaring birds to maintain sustained soaring flight with minimal energy expenditure?
• Which constraint results in a lethal hypothermic condition in newborns during extended exposure at low ambient temperatures?
• Which physiological effect sharply accelerates ice melt beneath a hibernating bear under warming temperature conditions?
• Which effect occurs when migratory birds encounter icing conditions that affect feather barbules?
• When xylem sap encounters a midday atmospheric vapor pressure deficit, which consequence results?