Which risk increases when contour feathers lose their barbules and hooklets in avian flight?

💡 Explanation

When barbules and hooklets detach in contour feathers, the feather's structure degrades because interlocking is lost weakening the vane profile essential for aerodynamic control. Therefore impaired flight authority results, rather than BMR increase, mechanical shearing or predation vulnerability which reflect unrelated physiological or ecological phenomena.

• Which metabolic consequence occurs when internal CO2 concentration decreases within photosynthetic bundle sheath cells using the C4 pathway?
• When an invasive plant species colonizes a disturbed but nutrient-poor habitat, which mechanism can significantly accelerate its population?
• Which outcome occurs when a marine fish fails to properly maintain blood osmolarity in saltwater?
• Which outcome results when a hibernating marmot's uncoupling protein 1 (UCP1) malfunctions?
• Which consequence occurs when significant magnetic interference impacts migratory bats?
• Which osmoregulatory outcome is seen when saltwater fish drink seawater without sufficient chloride cell activity?