What specialized function does the *Xerus* tail serve regarding intense solar radiation?
Answer
Functioning as an active thermal shield, held erect over the body
The tail of *Xerus* species exhibits a highly specialized behavioral adaptation crucial for survival under intense sunlight, classifying it as an active thermal shield. When exposed, these squirrels deliberately hold their tails vertically over their backs. This posture creates a portable awning or shade, effectively blocking direct solar radiation from hitting the sensitive dorsal skin. This action is a direct evolutionary response to the necessity of foraging in exposed areas where temperatures are extremely high, helping to prevent overheating and manage body temperature fluctuations during the hottest parts of the day.
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