Bee-pollinated flowers are rarely red, presumably because bees (which lack red receptors) have difficulty detecting red targets. Although the response of bees to red colour has been investigated in lab experiments, most stimuli have been pure red, while the subtle diversity of red as perceived by humans (human-red) has received very limited attention. Here we test the hypothesis that ultraviolet (UV) reflected from human-red flowers enhances their attractiveness to bees, through increased chromatic contrast.

中文翻译：

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紫外线成分增强了蜜蜂授粉植物的红色花朵的吸引力

蜜蜂授粉的花朵很少是红色的，大概是因为蜜蜂（缺少红色受体）难以检测红色目标。尽管在实验室实验中已经研究了蜜蜂对红色的反应，但是大多数刺激都是纯红色，而人类所感知的红色的微妙多样性（人类红色）受到的关注却非常有限。在这里，我们测试了以下假设：从人红色花朵反射的紫外线（UV）通过增加色差来增强它们对蜜蜂的吸引力。