Glossophagian or nectar-eating bats use their echo-location system to search for flowers with nectar even in the absence of light. Some flowers only open their petals at night, with the bat being its most important pollinator. This example of a symbiotic reproduction-food relationship is part of the magic that can be observed on a night tour. Like the bat, much of the biodiversity of the rainforest has nocturnal habits. Their adaptations have allowed them to survive in a world without light, obtaining advantages over their competition for food-gathering, and protecting them from their light-dependent predators. Frogs with charming sounds and colors, sloths, insects, and even snakes can be enjoyed at this wonderful rainforest night party.