What purpose does dark plumage serve for most vulture species?
Answer
It efficiently absorbs solar energy to aid in thermoregulation.
The dark color of a vulture's feathers is not merely a matter of pigmentation but a functional trait for survival. Dark colors are highly efficient at absorbing heat from solar radiation. For a bird that spends significant portions of its day soaring and waiting for air currents to rise, this passive absorption of heat helps maintain body temperature without requiring extra metabolic energy, especially in cooler high-altitude environments.
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