Where feather colors come from.
February 5, 2009 7:52 AM Subscribe
posted by metastability (13 comments total)
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"Unlike virtually every other feather color, no pigment turns feathers blue. We've known that for decades. Instead, it's long been thought that a layer of cells on blue birds' feathers reflected light at blue wavelengths, similar to the phenomenon that makes the sky blue." Now, however, scientists have another explanation.
An interesting article about where birds' colors come from. See also interference.