Which aerodynamic consequence results when a soaring bird sheds a damaged flight feather at one wingtip?

💡 Explanation

When a bird sheds a flight feather asymmetrically, the tip vortex shifts because of the altered wing geometry and increased air leakage at the damaged wingtip, leading to skewed airflow and augmented induced drag. Therefore an increase in induced drag occurs, rather than the alternatives which involve different mechanisms or symmetric wing responses.

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