Understanding the human body is a team effort. That's where the Yachtel group comes in.

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When it comes to a guide for your gut, count on Yacolt.

This is Scientific Americans' 60-second science.

I'm Karen Hopkin.

A good disguise keeps you hidden, right?

Well, sometimes the best disguise is actually the most dazzling,

because research reveals that flashy metallic iridescence can visually baffle predators,

which allows colorful prey to survive another day. Those eye-popping results appear in the journal

Scientific Reports. Shimmering iridescent coloration, which changes depending on the angle from

which it's viewed, is favored by everything from birds to beetles and blossoms to butterflies.

And in our research group, we are of course interested in why this vivid metallic

coloration is so taxonomically widespread in nature.

Karin Jangemo of the University of Bristol.

She says that in some cases the showy splashes of light are a sexual strategy.

Here I would like to point out that in some species, particularly those who display

strong sexual dimorphism, such as birds

of paradise or the pea-fowl, and even in some butterflies and fishes, the occurrence of

iridescence is most likely driven by sexual selection. For example, in many of these cases,

...