Specialization in nectarivory is an uncommon condition among bats, and it is restricted to two subfamilies of neotropical phyllostomids (Glossophaginae and Lonchophyllinae) which encompass dozens of bats with striking morpho-physiological adaptations to exploit floral nectar (Muchhala and Tschapka 2020). Such bats commonly start the search for flowers before the sun goes down, when the flowers are freshly opened (Sazima and Sazima 1975). After spotting a resource, nectarivorous bats prefer to use spatial memory instead of floral clues to look for new flowers (Carter et al. 2010). Therefore, it may be essential that chiropterophilous (i.e. bat-pollinated) flowers are attractive to bats during the early part of their searching routine when they build in their minds a trace of their foraging bouts. It is known that bats find flowers by integrating acoustic and olfactory cues, which are very useful in dark conditions (Gonzalez-Terrazas et al. 2016). However, since there still is plenty of light striking flowers during twilight, the question emerges: Do these flowers reflect light that also draws the attention of bats by addressing their color vision abilities?

中文翻译：

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黄昏中闪耀：蝙蝠授粉的花朵如何反射光线？

蜜饯专攻在蝙蝠中是一种不常见的情况，它仅限于新热带叶口动物的两个亚科（Glossophaginae 和 Lonchophyllinae），其中包括数十种具有惊人形态生理适应能力以利用花蜜的蝙蝠（Muchhala 和 Tschapka 2020）。这种蝙蝠通常在太阳下山之前开始寻找花朵，此时花朵刚刚开放（Sazima 和 Sazima 1975）。在发现资源后，食蜜蝙蝠更喜欢使用空间记忆而不是花卉线索来寻找新花（Carter et al. 2010）。因此，在蝙蝠寻找觅食的早期阶段，当蝙蝠在脑海中建立起觅食的踪迹时，手性昆虫（即蝙蝠授粉）的花朵可能对它们具有吸引力是至关重要的。众所周知，蝙蝠通过整合声学和嗅觉线索来寻找花朵，这在黑暗条件下非常有用（Gonzalez-Terrazas et al. 2016）。然而，由于在黄昏时仍然有大量光亮的花朵，问题就出现了：这些花朵是否会反射光线，从而通过解决蝙蝠的色觉能力来吸引蝙蝠的注意力？