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Nature & Animals

Which outcome limits the maximum glide ratio during avian dynamic soaring in turbulent air?

A)Increased parasite drag from feather ruffling
B)Reduced lift from disrupted laminar airflow
C)Elevated energy expenditure avoiding updrafts
D)Decreased stall speed due to ground effect

💡 Explanation

When turbulent air encounters a soaring bird, induced drag from increased feather ruffling to maintain control disrupts streamlined airflow, increasing parasite drag because of greater surface friction. Therefore maximum glide ratio decreases, rather than lift reduction, increased energy expenditure, or decreased stall speed, which need different atmospheric conditions.

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