While their stings are painful or even dangerous, we depend on hymenopterans for our survival. Bees are the main pollinators of the flowering plants that provide most of the world's food supply. Bee adaptations, such as hairy bodies and legs, have evolved for easy pollen collection. Other hymenopterans, such as wasps, are predators that kill insects and spiders. Some hymenopterans are parasites, laying eggs on other "host" insects, which may eventually die from the feeding larvae that hatch out. We benefit from predatory and parasitic hymenopterans that target the many insects that would otherwise be eating crops. Many hymenopterans are social, living in large colonies of related individuals, headed by a queen. Social insects procure their food cooperatively, and humans profit from the way honeybees collect and process flower nectar into honey. The sophisticated chemical senses of hymenopterans support the behaviors, such as nectar collection and pollination, that benefit us.