Which aerodynamic effect occurs when flight feathers separate excessively during avian flight?

💡 Explanation

When flight feathers separate excessively, induced drag increases substantially because the slotted wing effect is compromised, causing greater vortices at the wingtips, increasing drag. Therefore, induced drag increases substantially, rather than thermal lift rising, laminar flow transitioning, or profile drag decreasing, which would require different aerodynamic characteristics.

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