Red droplets in the cone cells of kingfisher eyes may allow sight through water or glare by acting as chromatic filters.

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"Kingfishers have specialized eyes and excellent eyesight. The retina of each eye has two fovea. The cone cells have a high proportion of red droplets, which may act as chromatic filters, allowing sight through the surface of the water." (Fowler and Miller 2003: 254)

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Kingfishers And RelativesCoraciiformesOrder

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