Which structural consequence occurs due to asymmetrical barbs in avian flight feathers during wind shear?

💡 Explanation

When wind shear impacts flight feathers, the asymmetrical barb structure causes differential pressure because the shorter, stiffer side resists bending more than the longer, flexible side, creating a controlled twist. Therefore feather twisting aiding stall results, rather than increased rigidity, bark splitting, or pigment fading which depend on different conditions.

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