Which physiological adjustment balances increased wing loading for migratory birds during long flights encountering headwinds?

💡 Explanation

When migratory birds encounter headwinds, their effective wing loading increases, requiring more power; thus, erythropoiesis boosts oxygen-carrying capacity because more red blood cells improve sustained muscle performance for prolonged exertion. Therefore, birds increase red blood cell count, rather than adaptations associated with thermoregulation, metabolism or digestion.

• Which consequence results when monarch butterflies' ultraviolet receptor is damaged during migration?
• Which metabolic constraint limits productivity in C3 photosynthetic pathways under high temperatures?
• Which metabolic consequence occurs when internal CO2 concentration decreases within photosynthetic bundle sheath cells using the C4 pathway?
• Which outcome occurs when Indigo Buntings raised indoors are seasonally exposed only to artificial, static light?
• Which outcome impairs scout bees' directive precision when obstacles displace the waggle?
• Which nutritional advantage relies on *hindgut fermentation* in ruminant animals?