Which outcome occurs when a migratory bird's flight feathers degrade, diminishing surface cohesion during flight?

💡 Explanation

When feather cohesion degrades, the disrupted airflow over the wing due to the separation of barbules decreases lift, because it increases turbulence and reduces the wing's effective surface area. Therefore reduced lift results, rather than temperature increase, enhanced maneuverability, or parasite resistance which require different biomechanical factors.

• Which outcome occurs in a euryhaline fish, transiting from salt to fresh water?
• Which risk increases when guard cells lose turgor pressure, decreasing stomata aperture size?
• Which metabolic outcome results when increased ocean acidity inhibits symbiosomes in coral?
• Which navigational failure results when starling flocks encounter magnetic anomalies?
• Which orientation failure occurs when a migrating bird's epigenetic clock malfunctions, impairing celestial navigation?
• Which risk increases when migrating salmon transition from saltwater to freshwater habitats during spawning season?