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Blue eggs may be more camouflaged in green foliage than white eggs. Also, eggshells with blue pigments in them are stronger than white eggshells, so more survive to hatch. Pigments may also offer some protection from UV light, which could cause mutations in the developing embryo.

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11y ago
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11y ago

To keep them warm xx

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Q: Why are the eggs of crows blue?
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