Tungara frogs (Engystomops pustulosus), which live throughout Central and South America, call and mate at night. They usually prefer to be out and about when it's really dark, since illumination increases their risk of getting eaten.
But sometimes the mood strikes while the moon is bright. So what's a lovesick frog to do?
Female Tungara frogs have learned to lower their standards. If it's pitch black she'll choose the most attractive male call, no matter the distance. But if the moon is out, and she can't be bothered with a long hike for love, she'll go for the loudest call, indicating a ready male who's right at hand.