Rare bird lays iridescent eggs

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Rare bird lays iridescent eggs Empty Rare bird lays iridescent eggs

Post by Ben Reilly on Wed Dec 10, 2014 8:22 pm

Rare bird lays iridescent eggs Dnews-files-2014-12-tinamao-eggs-141209-jpg

The first known naturally iridescent eggs have just been identified and are laid by a bird known as the great tinamou, aka "mountain hen," according to a paper published in the latest issue of the Journal of the Royal Society Interface.

Great tinamou eggs are so luminous that viewers actually perceive them as changing color when they are seen from different angles.

"Tinamous have some of the most colorful and glossy eggs of all birds, and here we show that an extremely smooth eggshell cuticle produces their mirror-like sheen," Branislav Igic, lead author of the paper, and colleagues wrote. "Furthermore, we reveal the presence of iridescence on the blue eggs of the great tinamou, an optical effect that has not been previously reported for avian eggs."

Great tinamous, native to Central and South America, are about the size and shape of a small turkey. Their body coloration is a bit drab (with colors ranging from olive green to white), but they help the bird to stay well camouflaged in their rainforest habitat.


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Ben Reilly
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