Why do plants that are pollinated by insects usually have bright flowers?

The bright color of flowers is a device for attracting insects. Insects have color vision due to the complex structure of their eyes; many of them have a real “sixth sense” – polarizing vision.
But insects often perceive the color of flowers in a completely different way than humans: bees perceive red, pink, orange, yellow and green. Flowers for bees have brightly colored petals, usually blue or yellow, often with a special pattern by which insects can easily recognize them. Flowers pollinated by butterflies are usually red or orange.
Considering the characteristics of bees and flower colors, the following types of plant coloring are distinguished:
* bees see yellow and purple flowers (swimsuit, spurge, coltsfoot), and a person – yellow or yellowish-green;
* bees – blue-green (lily of the valley, bindweed), man – mostly white;
* bees – blue and purple (thyme, bells), man – blue and purple;
* bees – ultraviolet (red poppy, red beans), humans – dark red;
* bees – blue-green (lily of the valley, bindweed), humans – mostly white;
* bees – blue and purple (thyme, bells), man – blue and purple;
* bees – leaf color – dark gray
Insects recognize familiar objects not only by color and shape, but also by the location of objects.

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