For years, researches assumed that vultures are bald because it keeps their head and neck area cleaner when they eat a carcass. However, there are other groups of scavengers that do have feathered heads. Now researchers agree that their bald heads help keep them adapt better to different weather conditions: “By changing their posture to expose more or less of the bare skin on their heads and necks, vultures could cut their heat loss by half in cold conditions and increase their heat loss by almost a quarter in certain hot conditions.”
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