They are able to see into the ultraviolet part of the electromagnetic spectrum that we humans are not able to see. Bees cant see colors with longer wavelengths such as red which appears black to them.
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Bees do not see color the same way humans do so they are attracted to certain flower colors.

Why are bees attracted to yellow. Bees are also attracted. Bees are attracted to yellow in fact colors from ultraviolet and yellow. Bees also see in a slightly different spectrum than humans.
Plants on the blue and yellow end of the color spectrum attract bees because those are the colors they can easily perceive. As a result of this type of vision bees are also unable to see the color red and are very attracted to the colors yellow. Bees dont see colors as we do.
Darker colors such as red appear black to bees and since black is the absence of color bees are not naturally attracted.
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