Which effect promotes long-distance soaring flight when a bird encounters air turbulence at its wingtips?

💡 Explanation

When encountering turbulence, birds reflexively adjust individual flight feathers, specifically contour feathers at the wingtips, using muscles to modify airflow which maintains lift and optimizes aerodynamic performance. Therefore feather micro-adjustments produce soaring, rather than changes in bone or muscle, which address structural features or broader physiological adaptations.

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