Nectar robbing is a phenomenon in which certain animals, such as insects or birds, access the nectar in flowers without providing any pollination services in return. This behavior can have negative effects on both the plant and the pollinators, as it can reduce the plant's reproductive success and disrupt the pollination process. Researchers study nectar robbing to understand its ecological implications, the factors that influence this behavior, and potential strategies to mitigate its impact on plant-pollinator interactions.