Color Coordination

Familiar Bluet rests on a leaf in Petobago, Michigan.

Damselflies use their vision to actively hunt prey and identify mates. The color is important for mate choice and intraspecific communication. Female Familiar Bluet damselflies, Enallagma civile, will change color from turquoise to brown during mating. What causes the color change?

The turquoise color is not a pigment but a structural color. The color is created by spherical granules packed into pigment cells just beneath the cuticle. The…

Source: Living With Insects Blog

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