It’s still not known exactly how female birds produce such colourful and intricately-patterned eggs. But we do have some theories about the survival advantage this provides.
Bird evolution - Noticias, Investigaciones y Análisis - The
Native wildlife – News, Research and Analysis – The Conversation
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Eggs – News, Research and Analysis – The Conversation – page 2
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Curious Kids: how do birds make their nests?
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