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Colorful spiders use specific optical illusions, new findings show


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Now, scientists report, these fingertip-size spiders may also rely on super black patches, interspersed between their technicolor hues, to dazzle the ladies. 

“If you frame a bright color in super black, it looks awfully different,” says Dakota McCoy, a graduate student at Harvard University who recently described these intensely black patches in two jumping spider species in the journal Proceedings of the Royal Society B.

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“We think the black makes them look more beautiful by emphasizing nearby colors.”

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According to the team’s observations, spider super black reflects less than 0.5 percent of incoming light, creating a gleam-free, featureless void in color.

That means these spider butts are among the most light absorbent in nature, on par with birds of paradise, another group of species in which males vie for females using flashy, colorful performances.

Source: https://www.nationalgeographic.com/animals/2019/05/peacock-spiders-black-females-courtship/

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