Which effect occurs when a migratory bird encounters increased tailwind shear during flight?

💡 Explanation

When a bird encounters increased tailwind shear, it experiences a sudden change in relative wind speed, quickly altering the lift and drag forces because aerodynamic control depends greatly on the feathers forming an airfoil. Therefore angle of attack instability results, rather than barometric changes, and feather manipulation or oxygen usage which occur chronically over migration and adaptation, respectively.

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