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The brilliant iridescent colors of the peacock's tail feathers are created by structural coloration, as first noted by Isaac Newton and Robert Hooke.. Structural coloration in animals, and a few plants, is the production of colour by microscopically structured surfaces fine enough to interfere with visible light instead of pigments, although some structural coloration occurs in combination ...
The Indian peacock feathers are used in many rituals and ornamentation and its motifs are widespread in architecture, coinage, textiles and modern items of art and utility. [31] Indian peacock motifs are widely used even today such as in the logos of the NBC television network and the Sri Lankan Airlines. [101] [102]
The feathers of the peacock also symbolize sun rays, from which come light, luminosity and brightness. The peacock opening the feathers of its tail in a circular shape symbolizes the sunrise. [46] Consequently, due to its holiness, Yazidis are not allowed to hunt and eat the peacock, ill-treat it or utter bad words about it.
Structural colouration has been understood in general terms since Robert Hooke's 1665 book Micrographia, where Hooke correctly noted that since the iridescence of a peacock's feather was lost when it was plunged into water, but reappeared when it was returned to the air, pigments could not be responsible.
Structural coloration means the production of colour by microscopically-structured surfaces fine enough to interfere with visible light, sometimes in combination with pigments: for example, peacock tail feathers are pigmented brown, but their structure makes them appear blue, turquoise and green.
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The second type of coloration that also involves gland secretions is with powder feathers. [22] Powder feathers are modified feathers that disintegrate into a fine powder. These powder feathers are found on pigeons, parrots, and herons. Herons provide a great example of how cosmetic coloration is related to mate choice and sexual selection.
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