Which primary risk does excessive feather wear pose birds during long-distance migration?

A)Reduced insulation efficiency leading hypothermia

B)Compromised flight leading increased energy expenditure✓

C)Impaired camouflage increasing predator vulnerability

D)Disrupted preening reduced waterproofing

💡 Explanation

Excessive feather wear during long-distance migration reduces aerodynamic efficiency because the disrupted barb arrangement increases drag and lift is adversely affected; this increases energy expenditure. Therefore aerodynamic performance decreases, rather than thermoregulation, camouflage, or waterproofing which rely on different feather structures.

🏆 Up to £1,000 monthly prize pool

Ready for the live challenge? Join the next global round now.
*Terms apply. Skill-based competition.

⚡ Enter Arena

Which primary risk does excessive feather wear pose birds during long-distance migration?

💡 Explanation

Related Questions