What specific characteristic of the lizard's skin suggests its need to avoid direct sun exposure?
Answer
Its delicate, pink or flesh-colored appearance
Despite inhabiting a harsh desert environment, the skin of *Bipes biporus* presents a striking contrast to the expected adaptations for intense sunlight. The text notes that the lizard maintains a delicate, pink or flesh-colored appearance. This coloration strongly suggests that its skin has not evolved robust adaptations to withstand significant exposure to ultraviolet (UV) radiation, reinforcing the necessity for its strictly subterranean lifestyle where it remains insulated from the powerful desert sun.

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